Finding the Fourth Proportional to 1,371.90, 1,893.33 and 782.48

Step by Step Solution

1. Step 1: Write the proportion equation
   1,371.90 : 1,893.33 = 782.48 : x
2. Step 2: Convert to fraction form
   1,371.90/1,893.33 = 782.48/x
3. Step 3: Cross multiply
   1,371.90x = 1,893.33 × 782.48
4. Step 4: Simplify right side
   1,371.90x = 1,481,492.86
5. Step 5: Solve for x
   x = 1,481,492.86/1,371.90
6. Step 6: Final answer
   x = 1,079.88