Finding the Fourth Proportional to 9,139.87, 12,613.91 and 5,554.04

Step by Step Solution

1. Step 1: Write the proportion equation
   9,139.87 : 12,613.91 = 5,554.04 : x
2. Step 2: Convert to fraction form
   9,139.87/12,613.91 = 5,554.04/x
3. Step 3: Cross multiply
   9,139.87x = 12,613.91 × 5,554.04
4. Step 4: Simplify right side
   9,139.87x = 70,058,161.64
5. Step 5: Solve for x
   x = 70,058,161.64/9,139.87
6. Step 6: Final answer
   x = 7,665.11