Finding the Fourth Proportional to 1,726.74, 2,588.69 and 686.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,726.74 : 2,588.69 = 686.30 : x
2. Step 2: Convert to fraction form
   1,726.74/2,588.69 = 686.30/x
3. Step 3: Cross multiply
   1,726.74x = 2,588.69 × 686.30
4. Step 4: Simplify right side
   1,726.74x = 1,776,605.00
5. Step 5: Solve for x
   x = 1,776,605.00/1,726.74
6. Step 6: Final answer
   x = 1,028.88