Finding the Fourth Proportional to 115,014.72, 158,711.76 and 64,704

Step by Step Solution

1. Step 1: Write the proportion equation
   115,014.72 : 158,711.76 = 64,704 : x
2. Step 2: Convert to fraction form
   115,014.72/158,711.76 = 64,704/x
3. Step 3: Cross multiply
   115,014.72x = 158,711.76 × 64,704
4. Step 4: Simplify right side
   115,014.72x = 10,269,285,719.04
5. Step 5: Solve for x
   x = 10,269,285,719.04/115,014.72
6. Step 6: Final answer
   x = 89,286.71