Finding the Fourth Proportional to 1,445.65, 1,994.98 and 782.49

Step by Step Solution

1. Step 1: Write the proportion equation
   1,445.65 : 1,994.98 = 782.49 : x
2. Step 2: Convert to fraction form
   1,445.65/1,994.98 = 782.49/x
3. Step 3: Cross multiply
   1,445.65x = 1,994.98 × 782.49
4. Step 4: Simplify right side
   1,445.65x = 1,561,042.06
5. Step 5: Solve for x
   x = 1,561,042.06/1,445.65
6. Step 6: Final answer
   x = 1,079.82