Finding the Fourth Proportional to 1,781.10, 2,672.73 and 686.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,781.10 : 2,672.73 = 686.34 : x
2. Step 2: Convert to fraction form
   1,781.10/2,672.73 = 686.34/x
3. Step 3: Cross multiply
   1,781.10x = 2,672.73 × 686.34
4. Step 4: Simplify right side
   1,781.10x = 1,834,401.51
5. Step 5: Solve for x
   x = 1,834,401.51/1,781.10
6. Step 6: Final answer
   x = 1,029.93