Finding the Fourth Proportional to 1,781.43, 2,669.82 and 1,289.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,781.43 : 2,669.82 = 1,289.50 : x
2. Step 2: Convert to fraction form
   1,781.43/2,669.82 = 1,289.50/x
3. Step 3: Cross multiply
   1,781.43x = 2,669.82 × 1,289.50
4. Step 4: Simplify right side
   1,781.43x = 3,442,732.89
5. Step 5: Solve for x
   x = 3,442,732.89/1,781.43
6. Step 6: Final answer
   x = 1,932.57