Finding the Fourth Proportional to 1,782.78, 2,459.97 and 996.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,782.78 : 2,459.97 = 996.72 : x
2. Step 2: Convert to fraction form
   1,782.78/2,459.97 = 996.72/x
3. Step 3: Cross multiply
   1,782.78x = 2,459.97 × 996.72
4. Step 4: Simplify right side
   1,782.78x = 2,451,901.30
5. Step 5: Solve for x
   x = 2,451,901.30/1,782.78
6. Step 6: Final answer
   x = 1,375.32