Finding the Fourth Proportional to 9,043.38, 12,479.90 and 5,064.57

Step by Step Solution

1. Step 1: Write the proportion equation
   9,043.38 : 12,479.90 = 5,064.57 : x
2. Step 2: Convert to fraction form
   9,043.38/12,479.90 = 5,064.57/x
3. Step 3: Cross multiply
   9,043.38x = 12,479.90 × 5,064.57
4. Step 4: Simplify right side
   9,043.38x = 63,205,301.82
5. Step 5: Solve for x
   x = 63,205,301.82/9,043.38
6. Step 6: Final answer
   x = 6,989.12