Finding the Fourth Proportional to 115,106.91, 158,854.83 and 64,809.15

Step by Step Solution

1. Step 1: Write the proportion equation
   115,106.91 : 158,854.83 = 64,809.15 : x
2. Step 2: Convert to fraction form
   115,106.91/158,854.83 = 64,809.15/x
3. Step 3: Cross multiply
   115,106.91x = 158,854.83 × 64,809.15
4. Step 4: Simplify right side
   115,106.91x = 10,295,246,505.69
5. Step 5: Solve for x
   x = 10,295,246,505.69/115,106.91
6. Step 6: Final answer
   x = 89,440.73