Finding the Fourth Proportional to 1,662.97, 2,488.27 and 1,043.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,662.97 : 2,488.27 = 1,043.78 : x
2. Step 2: Convert to fraction form
   1,662.97/2,488.27 = 1,043.78/x
3. Step 3: Cross multiply
   1,662.97x = 2,488.27 × 1,043.78
4. Step 4: Simplify right side
   1,662.97x = 2,597,195.32
5. Step 5: Solve for x
   x = 2,597,195.32/1,662.97
6. Step 6: Final answer
   x = 1,561.78