Finding the Fourth Proportional to 13,449.16, 18,553.98 and 8,404.60

Step by Step Solution

1. Step 1: Write the proportion equation
   13,449.16 : 18,553.98 = 8,404.60 : x
2. Step 2: Convert to fraction form
   13,449.16/18,553.98 = 8,404.60/x
3. Step 3: Cross multiply
   13,449.16x = 18,553.98 × 8,404.60
4. Step 4: Simplify right side
   13,449.16x = 155,938,780.31
5. Step 5: Solve for x
   x = 155,938,780.31/13,449.16
6. Step 6: Final answer
   x = 11,594.69