Finding the Fourth Proportional to 115,612.52, 159,498.06 and 91,643

Step by Step Solution

1. Step 1: Write the proportion equation
   115,612.52 : 159,498.06 = 91,643 : x
2. Step 2: Convert to fraction form
   115,612.52/159,498.06 = 91,643/x
3. Step 3: Cross multiply
   115,612.52x = 159,498.06 × 91,643
4. Step 4: Simplify right side
   115,612.52x = 14,616,880,712.58
5. Step 5: Solve for x
   x = 14,616,880,712.58/115,612.52
6. Step 6: Final answer
   x = 126,429.91