Finding the Fourth Proportional to 9,118.04, 12,581.94 and 5,139.76

Step by Step Solution

1. Step 1: Write the proportion equation
   9,118.04 : 12,581.94 = 5,139.76 : x
2. Step 2: Convert to fraction form
   9,118.04/12,581.94 = 5,139.76/x
3. Step 3: Cross multiply
   9,118.04x = 12,581.94 × 5,139.76
4. Step 4: Simplify right side
   9,118.04x = 64,668,151.93
5. Step 5: Solve for x
   x = 64,668,151.93/9,118.04
6. Step 6: Final answer
   x = 7,092.33