Finding the Fourth Proportional to 10,987.04, 16,469.10 and 5,436.92

Step by Step Solution

1. Step 1: Write the proportion equation
   10,987.04 : 16,469.10 = 5,436.92 : x
2. Step 2: Convert to fraction form
   10,987.04/16,469.10 = 5,436.92/x
3. Step 3: Cross multiply
   10,987.04x = 16,469.10 × 5,436.92
4. Step 4: Simplify right side
   10,987.04x = 89,541,179.17
5. Step 5: Solve for x
   x = 89,541,179.17/10,987.04
6. Step 6: Final answer
   x = 8,149.71