Finding the Fourth Proportional to 115,485.50, 159,370 and 65,187.74

Step by Step Solution

1. Step 1: Write the proportion equation
   115,485.50 : 159,370 = 65,187.74 : x
2. Step 2: Convert to fraction form
   115,485.50/159,370 = 65,187.74/x
3. Step 3: Cross multiply
   115,485.50x = 159,370 × 65,187.74
4. Step 4: Simplify right side
   115,485.50x = 10,388,970,123.80
5. Step 5: Solve for x
   x = 10,388,970,123.80/115,485.50
6. Step 6: Final answer
   x = 89,959.09