Finding the Fourth Proportional to 1,787.68, 2,467 and 1,042.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,787.68 : 2,467 = 1,042.15 : x
2. Step 2: Convert to fraction form
   1,787.68/2,467 = 1,042.15/x
3. Step 3: Cross multiply
   1,787.68x = 2,467 × 1,042.15
4. Step 4: Simplify right side
   1,787.68x = 2,570,984.05
5. Step 5: Solve for x
   x = 2,570,984.05/1,787.68
6. Step 6: Final answer
   x = 1,438.17