Finding the Fourth Proportional to 115,429.34, 159,291.86 and 64,439.12

Step by Step Solution

1. Step 1: Write the proportion equation
   115,429.34 : 159,291.86 = 64,439.12 : x
2. Step 2: Convert to fraction form
   115,429.34/159,291.86 = 64,439.12/x
3. Step 3: Cross multiply
   115,429.34x = 159,291.86 × 64,439.12
4. Step 4: Simplify right side
   115,429.34x = 10,264,626,162.91
5. Step 5: Solve for x
   x = 10,264,626,162.91/115,429.34
6. Step 6: Final answer
   x = 88,925.63