Finding the Fourth Proportional to 103,134.79, 142,334.72 and 57,812.05

Step by Step Solution

1. Step 1: Write the proportion equation
   103,134.79 : 142,334.72 = 57,812.05 : x
2. Step 2: Convert to fraction form
   103,134.79/142,334.72 = 57,812.05/x
3. Step 3: Cross multiply
   103,134.79x = 142,334.72 × 57,812.05
4. Step 4: Simplify right side
   103,134.79x = 8,228,661,949.38
5. Step 5: Solve for x
   x = 8,228,661,949.38/103,134.79
6. Step 6: Final answer
   x = 79,785.51