Finding the Fourth Proportional to 115,681.43, 159,648.52 and 64,698.91

Step by Step Solution

1. Step 1: Write the proportion equation
   115,681.43 : 159,648.52 = 64,698.91 : x
2. Step 2: Convert to fraction form
   115,681.43/159,648.52 = 64,698.91/x
3. Step 3: Cross multiply
   115,681.43x = 159,648.52 × 64,698.91
4. Step 4: Simplify right side
   115,681.43x = 10,329,084,666.24
5. Step 5: Solve for x
   x = 10,329,084,666.24/115,681.43
6. Step 6: Final answer
   x = 89,289.05