Finding the Fourth Proportional to 9,139.82, 12,612.18 and 5,362.58

Step by Step Solution

1. Step 1: Write the proportion equation
   9,139.82 : 12,612.18 = 5,362.58 : x
2. Step 2: Convert to fraction form
   9,139.82/12,612.18 = 5,362.58/x
3. Step 3: Cross multiply
   9,139.82x = 12,612.18 × 5,362.58
4. Step 4: Simplify right side
   9,139.82x = 67,633,761.16
5. Step 5: Solve for x
   x = 67,633,761.16/9,139.82
6. Step 6: Final answer
   x = 7,399.90