Finding the Fourth Proportional to 115,123.14, 158,875.43 and 64,139.31

Step by Step Solution

1. Step 1: Write the proportion equation
   115,123.14 : 158,875.43 = 64,139.31 : x
2. Step 2: Convert to fraction form
   115,123.14/158,875.43 = 64,139.31/x
3. Step 3: Cross multiply
   115,123.14x = 158,875.43 × 64,139.31
4. Step 4: Simplify right side
   115,123.14x = 10,190,160,135.46
5. Step 5: Solve for x
   x = 10,190,160,135.46/115,123.14
6. Step 6: Final answer
   x = 88,515.31