Finding the Fourth Proportional to 1,789.89, 2,681.15 and 862.71

Step by Step Solution

1. Step 1: Write the proportion equation
   1,789.89 : 2,681.15 = 862.71 : x
2. Step 2: Convert to fraction form
   1,789.89/2,681.15 = 862.71/x
3. Step 3: Cross multiply
   1,789.89x = 2,681.15 × 862.71
4. Step 4: Simplify right side
   1,789.89x = 2,313,043.67
5. Step 5: Solve for x
   x = 2,313,043.67/1,789.89
6. Step 6: Final answer
   x = 1,292.29