Finding the Fourth Proportional to 10,707.20, 16,062.72 and 3,686.88

Step by Step Solution

1. Step 1: Write the proportion equation
   10,707.20 : 16,062.72 = 3,686.88 : x
2. Step 2: Convert to fraction form
   10,707.20/16,062.72 = 3,686.88/x
3. Step 3: Cross multiply
   10,707.20x = 16,062.72 × 3,686.88
4. Step 4: Simplify right side
   10,707.20x = 59,221,321.11
5. Step 5: Solve for x
   x = 59,221,321.11/10,707.20
6. Step 6: Final answer
   x = 5,530.98