Finding the Fourth Proportional to 2,150.18, 3,225.30 and 611.18

Step by Step Solution

1. Step 1: Write the proportion equation
   2,150.18 : 3,225.30 = 611.18 : x
2. Step 2: Convert to fraction form
   2,150.18/3,225.30 = 611.18/x
3. Step 3: Cross multiply
   2,150.18x = 3,225.30 × 611.18
4. Step 4: Simplify right side
   2,150.18x = 1,971,238.85
5. Step 5: Solve for x
   x = 1,971,238.85/2,150.18
6. Step 6: Final answer
   x = 916.78