Finding the Fourth Proportional to 1,445.43, 1,994.67 and 782.28

Step by Step Solution

1. Step 1: Write the proportion equation
   1,445.43 : 1,994.67 = 782.28 : x
2. Step 2: Convert to fraction form
   1,445.43/1,994.67 = 782.28/x
3. Step 3: Cross multiply
   1,445.43x = 1,994.67 × 782.28
4. Step 4: Simplify right side
   1,445.43x = 1,560,390.45
5. Step 5: Solve for x
   x = 1,560,390.45/1,445.43
6. Step 6: Final answer
   x = 1,079.53