Finding the Fourth Proportional to 2,096.78, 3,144.45 and 615.61

Step by Step Solution

1. Step 1: Write the proportion equation
   2,096.78 : 3,144.45 = 615.61 : x
2. Step 2: Convert to fraction form
   2,096.78/3,144.45 = 615.61/x
3. Step 3: Cross multiply
   2,096.78x = 3,144.45 × 615.61
4. Step 4: Simplify right side
   2,096.78x = 1,935,754.86
5. Step 5: Solve for x
   x = 1,935,754.86/2,096.78
6. Step 6: Final answer
   x = 923.20