Finding the Fourth Proportional to 9,223.77, 12,728.42 and 5,448.15

Step by Step Solution

1. Step 1: Write the proportion equation
   9,223.77 : 12,728.42 = 5,448.15 : x
2. Step 2: Convert to fraction form
   9,223.77/12,728.42 = 5,448.15/x
3. Step 3: Cross multiply
   9,223.77x = 12,728.42 × 5,448.15
4. Step 4: Simplify right side
   9,223.77x = 69,346,341.42
5. Step 5: Solve for x
   x = 69,346,341.42/9,223.77
6. Step 6: Final answer
   x = 7,518.22