Finding the Fourth Proportional to 1,445.25, 1,994.43 and 782.08

Step by Step Solution

1. Step 1: Write the proportion equation
   1,445.25 : 1,994.43 = 782.08 : x
2. Step 2: Convert to fraction form
   1,445.25/1,994.43 = 782.08/x
3. Step 3: Cross multiply
   1,445.25x = 1,994.43 × 782.08
4. Step 4: Simplify right side
   1,445.25x = 1,559,806.31
5. Step 5: Solve for x
   x = 1,559,806.31/1,445.25
6. Step 6: Final answer
   x = 1,079.27