Finding the Fourth Proportional to 115,565.38, 159,477.17 and 64,578.53

Step by Step Solution

1. Step 1: Write the proportion equation
   115,565.38 : 159,477.17 = 64,578.53 : x
2. Step 2: Convert to fraction form
   115,565.38/159,477.17 = 64,578.53/x
3. Step 3: Cross multiply
   115,565.38x = 159,477.17 × 64,578.53
4. Step 4: Simplify right side
   115,565.38x = 10,298,800,086.88
5. Step 5: Solve for x
   x = 10,298,800,086.88/115,565.38
6. Step 6: Final answer
   x = 89,116.66