Finding the Fourth Proportional to 77,404.14, 106,717.50 and 50,131.71

Step by Step Solution

1. Step 1: Write the proportion equation
   77,404.14 : 106,717.50 = 50,131.71 : x
2. Step 2: Convert to fraction form
   77,404.14/106,717.50 = 50,131.71/x
3. Step 3: Cross multiply
   77,404.14x = 106,717.50 × 50,131.71
4. Step 4: Simplify right side
   77,404.14x = 5,349,930,761.93
5. Step 5: Solve for x
   x = 5,349,930,761.93/77,404.14
6. Step 6: Final answer
   x = 69,116.86