Finding the Fourth Proportional to 42,923,238,021.12, 64,391,850,849.51 and 12,673,434,573.72

Step by Step Solution

1. Step 1: Write the proportion equation
   42,923,238,021.12 : 64,391,850,849.51 = 12,673,434,573.72 : x
2. Step 2: Convert to fraction form
   42,923,238,021.12/64,391,850,849.51 = 12,673,434,573.72/x
3. Step 3: Cross multiply
   42,923,238,021.12x = 64,391,850,849.51 × 12,673,434,573.72
4. Step 4: Simplify right side
   42,923,238,021.12x = 816,065,908,822,001,582,080
5. Step 5: Solve for x
   x = 816,065,908,822,001,582,080/42,923,238,021.12
6. Step 6: Final answer
   x = 19,012,216,842.09