Finding the Fourth Proportional to 2,787.43, 3,842.58 and 2,123.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,787.43 : 3,842.58 = 2,123.12 : x
2. Step 2: Convert to fraction form
   2,787.43/3,842.58 = 2,123.12/x
3. Step 3: Cross multiply
   2,787.43x = 3,842.58 × 2,123.12
4. Step 4: Simplify right side
   2,787.43x = 8,158,258.45
5. Step 5: Solve for x
   x = 8,158,258.45/2,787.43
6. Step 6: Final answer
   x = 2,926.80