Finding the Fourth Proportional to 1,913.94, 2,869.83 and 615.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,913.94 : 2,869.83 = 615.42 : x
2. Step 2: Convert to fraction form
   1,913.94/2,869.83 = 615.42/x
3. Step 3: Cross multiply
   1,913.94x = 2,869.83 × 615.42
4. Step 4: Simplify right side
   1,913.94x = 1,766,150.78
5. Step 5: Solve for x
   x = 1,766,150.78/1,913.94
6. Step 6: Final answer
   x = 922.78