Finding the Fourth Proportional to 87,123.60, 130,422.15 and 78,807.33

Step by Step Solution

1. Step 1: Write the proportion equation
   87,123.60 : 130,422.15 = 78,807.33 : x
2. Step 2: Convert to fraction form
   87,123.60/130,422.15 = 78,807.33/x
3. Step 3: Cross multiply
   87,123.60x = 130,422.15 × 78,807.33
4. Step 4: Simplify right side
   87,123.60x = 10,278,221,414.36
5. Step 5: Solve for x
   x = 10,278,221,414.36/87,123.60
6. Step 6: Final answer
   x = 117,972.87