Finding the Fourth Proportional to 9,149.10, 12,628.72 and 5,372.17

Step by Step Solution

1. Step 1: Write the proportion equation
   9,149.10 : 12,628.72 = 5,372.17 : x
2. Step 2: Convert to fraction form
   9,149.10/12,628.72 = 5,372.17/x
3. Step 3: Cross multiply
   9,149.10x = 12,628.72 × 5,372.17
4. Step 4: Simplify right side
   9,149.10x = 67,843,540.72
5. Step 5: Solve for x
   x = 67,843,540.72/9,149.10
6. Step 6: Final answer
   x = 7,415.33