Finding the Fourth Proportional to 9,225.15, 12,730.32 and 5,449.53

Step by Step Solution

1. Step 1: Write the proportion equation
   9,225.15 : 12,730.32 = 5,449.53 : x
2. Step 2: Convert to fraction form
   9,225.15/12,730.32 = 5,449.53/x
3. Step 3: Cross multiply
   9,225.15x = 12,730.32 × 5,449.53
4. Step 4: Simplify right side
   9,225.15x = 69,374,260.75
5. Step 5: Solve for x
   x = 69,374,260.75/9,225.15
6. Step 6: Final answer
   x = 7,520.12