Finding the Fourth Proportional to 9,222.51, 12,728.69 and 5,445.43

Step by Step Solution

1. Step 1: Write the proportion equation
   9,222.51 : 12,728.69 = 5,445.43 : x
2. Step 2: Convert to fraction form
   9,222.51/12,728.69 = 5,445.43/x
3. Step 3: Cross multiply
   9,222.51x = 12,728.69 × 5,445.43
4. Step 4: Simplify right side
   9,222.51x = 69,313,182.39
5. Step 5: Solve for x
   x = 69,313,182.39/9,222.51
6. Step 6: Final answer
   x = 7,515.65