Finding the Fourth Proportional to 2,002.55, 3,003.69 and 615.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,002.55 : 3,003.69 = 615.78 : x
2. Step 2: Convert to fraction form
   2,002.55/3,003.69 = 615.78/x
3. Step 3: Cross multiply
   2,002.55x = 3,003.69 × 615.78
4. Step 4: Simplify right side
   2,002.55x = 1,849,612.23
5. Step 5: Solve for x
   x = 1,849,612.23/2,002.55
6. Step 6: Final answer
   x = 923.63