Finding the Fourth Proportional to 42,906,971.31, 64,353,561.63 and 11,775,354.76

Step by Step Solution

1. Step 1: Write the proportion equation
   42,906,971.31 : 64,353,561.63 = 11,775,354.76 : x
2. Step 2: Convert to fraction form
   42,906,971.31/64,353,561.63 = 11,775,354.76/x
3. Step 3: Cross multiply
   42,906,971.31x = 64,353,561.63 × 11,775,354.76
4. Step 4: Simplify right side
   42,906,971.31x = 757,786,018,262,773.88
5. Step 5: Solve for x
   x = 757,786,018,262,773.88/42,906,971.31
6. Step 6: Final answer
   x = 17,661,139.79