Finding the Fourth Proportional to 42,987,345.37, 64,421,362.06 and 19,586,900.66

Step by Step Solution

1. Step 1: Write the proportion equation
   42,987,345.37 : 64,421,362.06 = 19,586,900.66 : x
2. Step 2: Convert to fraction form
   42,987,345.37/64,421,362.06 = 19,586,900.66/x
3. Step 3: Cross multiply
   42,987,345.37x = 64,421,362.06 × 19,586,900.66
4. Step 4: Simplify right side
   42,987,345.37x = 1,261,814,818,680,039
5. Step 5: Solve for x
   x = 1,261,814,818,680,039/42,987,345.37
6. Step 6: Final answer
   x = 29,353,169.12