Finding the Fourth Proportional to 21,048.62, 31,545.50 and 8,554.04

Step by Step Solution

1. Step 1: Write the proportion equation
   21,048.62 : 31,545.50 = 8,554.04 : x
2. Step 2: Convert to fraction form
   21,048.62/31,545.50 = 8,554.04/x
3. Step 3: Cross multiply
   21,048.62x = 31,545.50 × 8,554.04
4. Step 4: Simplify right side
   21,048.62x = 269,841,268.32
5. Step 5: Solve for x
   x = 269,841,268.32/21,048.62
6. Step 6: Final answer
   x = 12,819.91