Finding the Fourth Proportional to 13,359.83, 18,436.85 and 7,391.91

Step by Step Solution

1. Step 1: Write the proportion equation
   13,359.83 : 18,436.85 = 7,391.91 : x
2. Step 2: Convert to fraction form
   13,359.83/18,436.85 = 7,391.91/x
3. Step 3: Cross multiply
   13,359.83x = 18,436.85 × 7,391.91
4. Step 4: Simplify right side
   13,359.83x = 136,283,498.92
5. Step 5: Solve for x
   x = 136,283,498.92/13,359.83
6. Step 6: Final answer
   x = 10,200.99