Finding the Fourth Proportional to 1,371.61, 1,892.77 and 782.03

Step by Step Solution

1. Step 1: Write the proportion equation
   1,371.61 : 1,892.77 = 782.03 : x
2. Step 2: Convert to fraction form
   1,371.61/1,892.77 = 782.03/x
3. Step 3: Cross multiply
   1,371.61x = 1,892.77 × 782.03
4. Step 4: Simplify right side
   1,371.61x = 1,480,202.92
5. Step 5: Solve for x
   x = 1,480,202.92/1,371.61
6. Step 6: Final answer
   x = 1,079.17