Finding the Fourth Proportional to 115,274.27, 159,078.17 and 64,287.05

Step by Step Solution

1. Step 1: Write the proportion equation
   115,274.27 : 159,078.17 = 64,287.05 : x
2. Step 2: Convert to fraction form
   115,274.27/159,078.17 = 64,287.05/x
3. Step 3: Cross multiply
   115,274.27x = 159,078.17 × 64,287.05
4. Step 4: Simplify right side
   115,274.27x = 10,226,665,151.87
5. Step 5: Solve for x
   x = 10,226,665,151.87/115,274.27
6. Step 6: Final answer
   x = 88,715.94