Finding the Fourth Proportional to 1,447.10, 1,996.99 and 783.95

Step by Step Solution

1. Step 1: Write the proportion equation
   1,447.10 : 1,996.99 = 783.95 : x
2. Step 2: Convert to fraction form
   1,447.10/1,996.99 = 783.95/x
3. Step 3: Cross multiply
   1,447.10x = 1,996.99 × 783.95
4. Step 4: Simplify right side
   1,447.10x = 1,565,540.31
5. Step 5: Solve for x
   x = 1,565,540.31/1,447.10
6. Step 6: Final answer
   x = 1,081.85