Finding the Fourth Proportional to 9,321.62, 12,862.40 and 5,543.47

Step by Step Solution

1. Step 1: Write the proportion equation
   9,321.62 : 12,862.40 = 5,543.47 : x
2. Step 2: Convert to fraction form
   9,321.62/12,862.40 = 5,543.47/x
3. Step 3: Cross multiply
   9,321.62x = 12,862.40 × 5,543.47
4. Step 4: Simplify right side
   9,321.62x = 71,302,316.89
5. Step 5: Solve for x
   x = 71,302,316.89/9,321.62
6. Step 6: Final answer
   x = 7,649.14