Finding the Fourth Proportional to 9,079.64, 12,528.29 and 5,543.99

Step by Step Solution

1. Step 1: Write the proportion equation
   9,079.64 : 12,528.29 = 5,543.99 : x
2. Step 2: Convert to fraction form
   9,079.64/12,528.29 = 5,543.99/x
3. Step 3: Cross multiply
   9,079.64x = 12,528.29 × 5,543.99
4. Step 4: Simplify right side
   9,079.64x = 69,456,665.70
5. Step 5: Solve for x
   x = 69,456,665.70/9,079.64
6. Step 6: Final answer
   x = 7,649.72