Finding the Fourth Proportional to 8,488.72, 12,726.90 and 5,708.48

Step by Step Solution

1. Step 1: Write the proportion equation
   8,488.72 : 12,726.90 = 5,708.48 : x
2. Step 2: Convert to fraction form
   8,488.72/12,726.90 = 5,708.48/x
3. Step 3: Cross multiply
   8,488.72x = 12,726.90 × 5,708.48
4. Step 4: Simplify right side
   8,488.72x = 72,651,254.11
5. Step 5: Solve for x
   x = 72,651,254.11/8,488.72
6. Step 6: Final answer
   x = 8,558.56