Finding the Fourth Proportional to 1,445.46, 1,994.74 and 782.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,445.46 : 1,994.74 = 782.31 : x
2. Step 2: Convert to fraction form
   1,445.46/1,994.74 = 782.31/x
3. Step 3: Cross multiply
   1,445.46x = 1,994.74 × 782.31
4. Step 4: Simplify right side
   1,445.46x = 1,560,513.08
5. Step 5: Solve for x
   x = 1,560,513.08/1,445.46
6. Step 6: Final answer
   x = 1,079.59