Finding the Fourth Proportional to 1,411.88, 1,948.34 and 782.39

Step by Step Solution

1. Step 1: Write the proportion equation
   1,411.88 : 1,948.34 = 782.39 : x
2. Step 2: Convert to fraction form
   1,411.88/1,948.34 = 782.39/x
3. Step 3: Cross multiply
   1,411.88x = 1,948.34 × 782.39
4. Step 4: Simplify right side
   1,411.88x = 1,524,357.79
5. Step 5: Solve for x
   x = 1,524,357.79/1,411.88
6. Step 6: Final answer
   x = 1,079.67