Finding the Fourth Proportional to 9,275.49, 12,800.70 and 5,500.89

Step by Step Solution

1. Step 1: Write the proportion equation
   9,275.49 : 12,800.70 = 5,500.89 : x
2. Step 2: Convert to fraction form
   9,275.49/12,800.70 = 5,500.89/x
3. Step 3: Cross multiply
   9,275.49x = 12,800.70 × 5,500.89
4. Step 4: Simplify right side
   9,275.49x = 70,415,242.62
5. Step 5: Solve for x
   x = 70,415,242.62/9,275.49
6. Step 6: Final answer
   x = 7,591.54