Finding the Fourth Proportional to 74,105.40, 102,314.34 and 57,079.56

Step by Step Solution

1. Step 1: Write the proportion equation
   74,105.40 : 102,314.34 = 57,079.56 : x
2. Step 2: Convert to fraction form
   74,105.40/102,314.34 = 57,079.56/x
3. Step 3: Cross multiply
   74,105.40x = 102,314.34 × 57,079.56
4. Step 4: Simplify right side
   74,105.40x = 5,840,057,508.89
5. Step 5: Solve for x
   x = 5,840,057,508.89/74,105.40
6. Step 6: Final answer
   x = 78,807.45