Finding the Fourth Proportional to 1,445.85, 1,995.25 and 782.71

Step by Step Solution

1. Step 1: Write the proportion equation
   1,445.85 : 1,995.25 = 782.71 : x
2. Step 2: Convert to fraction form
   1,445.85/1,995.25 = 782.71/x
3. Step 3: Cross multiply
   1,445.85x = 1,995.25 × 782.71
4. Step 4: Simplify right side
   1,445.85x = 1,561,707.87
5. Step 5: Solve for x
   x = 1,561,707.87/1,445.85
6. Step 6: Final answer
   x = 1,080.13