Finding the Fourth Proportional to 1,445.53, 1,994.83 and 782.38

Step by Step Solution

1. Step 1: Write the proportion equation
   1,445.53 : 1,994.83 = 782.38 : x
2. Step 2: Convert to fraction form
   1,445.53/1,994.83 = 782.38/x
3. Step 3: Cross multiply
   1,445.53x = 1,994.83 × 782.38
4. Step 4: Simplify right side
   1,445.53x = 1,560,711.18
5. Step 5: Solve for x
   x = 1,560,711.18/1,445.53
6. Step 6: Final answer
   x = 1,079.68