Finding the Fourth Proportional to 1,445.40, 1,994.67 and 782.27

Step by Step Solution

1. Step 1: Write the proportion equation
   1,445.40 : 1,994.67 = 782.27 : x
2. Step 2: Convert to fraction form
   1,445.40/1,994.67 = 782.27/x
3. Step 3: Cross multiply
   1,445.40x = 1,994.67 × 782.27
4. Step 4: Simplify right side
   1,445.40x = 1,560,370.50
5. Step 5: Solve for x
   x = 1,560,370.50/1,445.40
6. Step 6: Final answer
   x = 1,079.54