Finding the Fourth Proportional to 9,118.69, 12,583.82 and 5,139.83

Step by Step Solution

1. Step 1: Write the proportion equation
   9,118.69 : 12,583.82 = 5,139.83 : x
2. Step 2: Convert to fraction form
   9,118.69/12,583.82 = 5,139.83/x
3. Step 3: Cross multiply
   9,118.69x = 12,583.82 × 5,139.83
4. Step 4: Simplify right side
   9,118.69x = 64,678,695.55
5. Step 5: Solve for x
   x = 64,678,695.55/9,118.69
6. Step 6: Final answer
   x = 7,092.98