Finding the Fourth Proportional to 3,611.72, 5,414.70 and 1,665.29

Step by Step Solution

1. Step 1: Write the proportion equation
   3,611.72 : 5,414.70 = 1,665.29 : x
2. Step 2: Convert to fraction form
   3,611.72/5,414.70 = 1,665.29/x
3. Step 3: Cross multiply
   3,611.72x = 5,414.70 × 1,665.29
4. Step 4: Simplify right side
   3,611.72x = 9,017,045.76
5. Step 5: Solve for x
   x = 9,017,045.76/3,611.72
6. Step 6: Final answer
   x = 2,496.61