Finding the Fourth Proportional to 1,781.73, 2,671.90 and 712.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,781.73 : 2,671.90 = 712.83 : x
2. Step 2: Convert to fraction form
   1,781.73/2,671.90 = 712.83/x
3. Step 3: Cross multiply
   1,781.73x = 2,671.90 × 712.83
4. Step 4: Simplify right side
   1,781.73x = 1,904,622.72
5. Step 5: Solve for x
   x = 1,904,622.72/1,781.73
6. Step 6: Final answer
   x = 1,068.97