Finding the Fourth Proportional to 10,985.12, 15,159.33 and 5,949.20

Step by Step Solution

1. Step 1: Write the proportion equation
   10,985.12 : 15,159.33 = 5,949.20 : x
2. Step 2: Convert to fraction form
   10,985.12/15,159.33 = 5,949.20/x
3. Step 3: Cross multiply
   10,985.12x = 15,159.33 × 5,949.20
4. Step 4: Simplify right side
   10,985.12x = 90,185,886.04
5. Step 5: Solve for x
   x = 90,185,886.04/10,985.12
6. Step 6: Final answer
   x = 8,209.82