Finding the Fourth Proportional to 10,705.28, 16,059.24 and 3,686.72

Step by Step Solution

1. Step 1: Write the proportion equation
   10,705.28 : 16,059.24 = 3,686.72 : x
2. Step 2: Convert to fraction form
   10,705.28/16,059.24 = 3,686.72/x
3. Step 3: Cross multiply
   10,705.28x = 16,059.24 × 3,686.72
4. Step 4: Simplify right side
   10,705.28x = 59,205,921.29
5. Step 5: Solve for x
   x = 59,205,921.29/10,705.28
6. Step 6: Final answer
   x = 5,530.53