Finding the Fourth Proportional to 1,445.78, 1,995.17 and 782.62

Step by Step Solution

1. Step 1: Write the proportion equation
   1,445.78 : 1,995.17 = 782.62 : x
2. Step 2: Convert to fraction form
   1,445.78/1,995.17 = 782.62/x
3. Step 3: Cross multiply
   1,445.78x = 1,995.17 × 782.62
4. Step 4: Simplify right side
   1,445.78x = 1,561,451.04
5. Step 5: Solve for x
   x = 1,561,451.04/1,445.78
6. Step 6: Final answer
   x = 1,080.00