Finding the Fourth Proportional to 1,445.58, 1,994.88 and 782.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,445.58 : 1,994.88 = 782.42 : x
2. Step 2: Convert to fraction form
   1,445.58/1,994.88 = 782.42/x
3. Step 3: Cross multiply
   1,445.58x = 1,994.88 × 782.42
4. Step 4: Simplify right side
   1,445.58x = 1,560,834.01
5. Step 5: Solve for x
   x = 1,560,834.01/1,445.58
6. Step 6: Final answer
   x = 1,079.73