Finding the Fourth Proportional to 1,371.72, 1,892.97 and 782.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,371.72 : 1,892.97 = 782.25 : x
2. Step 2: Convert to fraction form
   1,371.72/1,892.97 = 782.25/x
3. Step 3: Cross multiply
   1,371.72x = 1,892.97 × 782.25
4. Step 4: Simplify right side
   1,371.72x = 1,480,775.78
5. Step 5: Solve for x
   x = 1,480,775.78/1,371.72
6. Step 6: Final answer
   x = 1,079.50