Finding the Fourth Proportional to 2,659.16, 3,669.72 and 1,611.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,659.16 : 3,669.72 = 1,611.20 : x
2. Step 2: Convert to fraction form
   2,659.16/3,669.72 = 1,611.20/x
3. Step 3: Cross multiply
   2,659.16x = 3,669.72 × 1,611.20
4. Step 4: Simplify right side
   2,659.16x = 5,912,652.86
5. Step 5: Solve for x
   x = 5,912,652.86/2,659.16
6. Step 6: Final answer
   x = 2,223.50