Finding the Fourth Proportional to 1,780.31, 2,456.17 and 1,116.92

Step by Step Solution

1. Step 1: Write the proportion equation
   1,780.31 : 2,456.17 = 1,116.92 : x
2. Step 2: Convert to fraction form
   1,780.31/2,456.17 = 1,116.92/x
3. Step 3: Cross multiply
   1,780.31x = 2,456.17 × 1,116.92
4. Step 4: Simplify right side
   1,780.31x = 2,743,330.32
5. Step 5: Solve for x
   x = 2,743,330.32/1,780.31
6. Step 6: Final answer
   x = 1,540.93