Finding the Fourth Proportional to 2,340.57, 3,510.89 and 609.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,340.57 : 3,510.89 = 609.20 : x
2. Step 2: Convert to fraction form
   2,340.57/3,510.89 = 609.20/x
3. Step 3: Cross multiply
   2,340.57x = 3,510.89 × 609.20
4. Step 4: Simplify right side
   2,340.57x = 2,138,813.59
5. Step 5: Solve for x
   x = 2,138,813.59/2,340.57
6. Step 6: Final answer
   x = 913.80