Finding the Fourth Proportional to 113,290.52, 156,363.55 and 86,384.95

Step by Step Solution

1. Step 1: Write the proportion equation
   113,290.52 : 156,363.55 = 86,384.95 : x
2. Step 2: Convert to fraction form
   113,290.52/156,363.55 = 86,384.95/x
3. Step 3: Cross multiply
   113,290.52x = 156,363.55 × 86,384.95
4. Step 4: Simplify right side
   113,290.52x = 13,507,456,841.70
5. Step 5: Solve for x
   x = 13,507,456,841.70/113,290.52
6. Step 6: Final answer
   x = 119,228.49