Finding the Fourth Proportional to 8,998.49, 12,419.52 and 5,644.20

Step by Step Solution

1. Step 1: Write the proportion equation
   8,998.49 : 12,419.52 = 5,644.20 : x
2. Step 2: Convert to fraction form
   8,998.49/12,419.52 = 5,644.20/x
3. Step 3: Cross multiply
   8,998.49x = 12,419.52 × 5,644.20
4. Step 4: Simplify right side
   8,998.49x = 70,098,254.78
5. Step 5: Solve for x
   x = 70,098,254.78/8,998.49
6. Step 6: Final answer
   x = 7,790.00