Finding the Fourth Proportional to 115,672.50, 159,628.32 and 65,371.50

Step by Step Solution

1. Step 1: Write the proportion equation
   115,672.50 : 159,628.32 = 65,371.50 : x
2. Step 2: Convert to fraction form
   115,672.50/159,628.32 = 65,371.50/x
3. Step 3: Cross multiply
   115,672.50x = 159,628.32 × 65,371.50
4. Step 4: Simplify right side
   115,672.50x = 10,435,142,720.88
5. Step 5: Solve for x
   x = 10,435,142,720.88/115,672.50
6. Step 6: Final answer
   x = 90,212.82