Finding the Fourth Proportional to 8,689.48, 13,003.43 and 5,404.12

Step by Step Solution

1. Step 1: Write the proportion equation
   8,689.48 : 13,003.43 = 5,404.12 : x
2. Step 2: Convert to fraction form
   8,689.48/13,003.43 = 5,404.12/x
3. Step 3: Cross multiply
   8,689.48x = 13,003.43 × 5,404.12
4. Step 4: Simplify right side
   8,689.48x = 70,272,031.11
5. Step 5: Solve for x
   x = 70,272,031.11/8,689.48
6. Step 6: Final answer
   x = 8,087.03