Finding the Fourth Proportional to 8,988.10, 12,400.17 and 5,450.02

Step by Step Solution

1. Step 1: Write the proportion equation
   8,988.10 : 12,400.17 = 5,450.02 : x
2. Step 2: Convert to fraction form
   8,988.10/12,400.17 = 5,450.02/x
3. Step 3: Cross multiply
   8,988.10x = 12,400.17 × 5,450.02
4. Step 4: Simplify right side
   8,988.10x = 67,581,174.50
5. Step 5: Solve for x
   x = 67,581,174.50/8,988.10
6. Step 6: Final answer
   x = 7,518.96