Finding the Fourth Proportional to 1,371.98, 1,893.05 and 782.49

Step by Step Solution

1. Step 1: Write the proportion equation
   1,371.98 : 1,893.05 = 782.49 : x
2. Step 2: Convert to fraction form
   1,371.98/1,893.05 = 782.49/x
3. Step 3: Cross multiply
   1,371.98x = 1,893.05 × 782.49
4. Step 4: Simplify right side
   1,371.98x = 1,481,288.78
5. Step 5: Solve for x
   x = 1,481,288.78/1,371.98
6. Step 6: Final answer
   x = 1,079.68