Finding the Fourth Proportional to 9,248.72, 12,761.96 and 5,215.59

Step by Step Solution

1. Step 1: Write the proportion equation
   9,248.72 : 12,761.96 = 5,215.59 : x
2. Step 2: Convert to fraction form
   9,248.72/12,761.96 = 5,215.59/x
3. Step 3: Cross multiply
   9,248.72x = 12,761.96 × 5,215.59
4. Step 4: Simplify right side
   9,248.72x = 66,561,124.88
5. Step 5: Solve for x
   x = 66,561,124.88/9,248.72
6. Step 6: Final answer
   x = 7,196.80