Finding the Fourth Proportional to 1,445.75, 1,995.15 and 782.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,445.75 : 1,995.15 = 782.61 : x
2. Step 2: Convert to fraction form
   1,445.75/1,995.15 = 782.61/x
3. Step 3: Cross multiply
   1,445.75x = 1,995.15 × 782.61
4. Step 4: Simplify right side
   1,445.75x = 1,561,424.34
5. Step 5: Solve for x
   x = 1,561,424.34/1,445.75
6. Step 6: Final answer
   x = 1,080.01