Finding the Fourth Proportional to 1,445.32, 1,994.53 and 782.17

Step by Step Solution

1. Step 1: Write the proportion equation
   1,445.32 : 1,994.53 = 782.17 : x
2. Step 2: Convert to fraction form
   1,445.32/1,994.53 = 782.17/x
3. Step 3: Cross multiply
   1,445.32x = 1,994.53 × 782.17
4. Step 4: Simplify right side
   1,445.32x = 1,560,055.57
5. Step 5: Solve for x
   x = 1,560,055.57/1,445.32
6. Step 6: Final answer
   x = 1,079.39