Finding the Fourth Proportional to 1,892.79, 2,612.09 and 1,042.09

Step by Step Solution

1. Step 1: Write the proportion equation
   1,892.79 : 2,612.09 = 1,042.09 : x
2. Step 2: Convert to fraction form
   1,892.79/2,612.09 = 1,042.09/x
3. Step 3: Cross multiply
   1,892.79x = 2,612.09 × 1,042.09
4. Step 4: Simplify right side
   1,892.79x = 2,722,028.94
5. Step 5: Solve for x
   x = 2,722,028.94/1,892.79
6. Step 6: Final answer
   x = 1,438.10