Finding the Fourth Proportional to 57,404,578.71, 86,147,218.29 and 51,916,121.78

Step by Step Solution

1. Step 1: Write the proportion equation
   57,404,578.71 : 86,147,218.29 = 51,916,121.78 : x
2. Step 2: Convert to fraction form
   57,404,578.71/86,147,218.29 = 51,916,121.78/x
3. Step 3: Cross multiply
   57,404,578.71x = 86,147,218.29 × 51,916,121.78
4. Step 4: Simplify right side
   57,404,578.71x = 4,472,429,475,321,147.50
5. Step 5: Solve for x
   x = 4,472,429,475,321,147.50/57,404,578.71
6. Step 6: Final answer
   x = 77,910,675.00