Finding the Fourth Proportional to 115,582.16, 159,511.56 and 65,288.72

Step by Step Solution

1. Step 1: Write the proportion equation
   115,582.16 : 159,511.56 = 65,288.72 : x
2. Step 2: Convert to fraction form
   115,582.16/159,511.56 = 65,288.72/x
3. Step 3: Cross multiply
   115,582.16x = 159,511.56 × 65,288.72
4. Step 4: Simplify right side
   115,582.16x = 10,414,305,577.60
5. Step 5: Solve for x
   x = 10,414,305,577.60/115,582.16
6. Step 6: Final answer
   x = 90,103.05