Finding the Fourth Proportional to 115,290.52, 159,103.32 and 64,989.52

Step by Step Solution

1. Step 1: Write the proportion equation
   115,290.52 : 159,103.32 = 64,989.52 : x
2. Step 2: Convert to fraction form
   115,290.52/159,103.32 = 64,989.52/x
3. Step 3: Cross multiply
   115,290.52x = 159,103.32 × 64,989.52
4. Step 4: Simplify right side
   115,290.52x = 10,340,048,397.21
5. Step 5: Solve for x
   x = 10,340,048,397.21/115,290.52
6. Step 6: Final answer
   x = 89,686.89