Finding the Fourth Proportional to 115,707.20, 159,673.82 and 65,406.20

Step by Step Solution

1. Step 1: Write the proportion equation
   115,707.20 : 159,673.82 = 65,406.20 : x
2. Step 2: Convert to fraction form
   115,707.20/159,673.82 = 65,406.20/x
3. Step 3: Cross multiply
   115,707.20x = 159,673.82 × 65,406.20
4. Step 4: Simplify right side
   115,707.20x = 10,443,656,680.28
5. Step 5: Solve for x
   x = 10,443,656,680.28/115,707.20
6. Step 6: Final answer
   x = 90,259.35