Finding the Fourth Proportional to 1,392.66, 1,925.37 and 1,042.74

Step by Step Solution

1. Step 1: Write the proportion equation
   1,392.66 : 1,925.37 = 1,042.74 : x
2. Step 2: Convert to fraction form
   1,392.66/1,925.37 = 1,042.74/x
3. Step 3: Cross multiply
   1,392.66x = 1,925.37 × 1,042.74
4. Step 4: Simplify right side
   1,392.66x = 2,007,660.31
5. Step 5: Solve for x
   x = 2,007,660.31/1,392.66
6. Step 6: Final answer
   x = 1,441.60