Finding the Fourth Proportional to 9,689.76, 13,372.56 and 5,498.28

Step by Step Solution

1. Step 1: Write the proportion equation
   9,689.76 : 13,372.56 = 5,498.28 : x
2. Step 2: Convert to fraction form
   9,689.76/13,372.56 = 5,498.28/x
3. Step 3: Cross multiply
   9,689.76x = 13,372.56 × 5,498.28
4. Step 4: Simplify right side
   9,689.76x = 73,526,079.20
5. Step 5: Solve for x
   x = 73,526,079.20/9,689.76
6. Step 6: Final answer
   x = 7,588.02