Finding the Fourth Proportional to 9,046.86, 12,489.03 and 5,691.30

Step by Step Solution

1. Step 1: Write the proportion equation
   9,046.86 : 12,489.03 = 5,691.30 : x
2. Step 2: Convert to fraction form
   9,046.86/12,489.03 = 5,691.30/x
3. Step 3: Cross multiply
   9,046.86x = 12,489.03 × 5,691.30
4. Step 4: Simplify right side
   9,046.86x = 71,078,816.44
5. Step 5: Solve for x
   x = 71,078,816.44/9,046.86
6. Step 6: Final answer
   x = 7,856.74