Finding the Fourth Proportional to 1,726.81, 2,591.53 and 1,265.76

Step by Step Solution

1. Step 1: Write the proportion equation
   1,726.81 : 2,591.53 = 1,265.76 : x
2. Step 2: Convert to fraction form
   1,726.81/2,591.53 = 1,265.76/x
3. Step 3: Cross multiply
   1,726.81x = 2,591.53 × 1,265.76
4. Step 4: Simplify right side
   1,726.81x = 3,280,255.01
5. Step 5: Solve for x
   x = 3,280,255.01/1,726.81
6. Step 6: Final answer
   x = 1,899.60