Finding the Fourth Proportional to 1,724.80, 2,588.82 and 1,231.70

Step by Step Solution

1. Step 1: Write the proportion equation
   1,724.80 : 2,588.82 = 1,231.70 : x
2. Step 2: Convert to fraction form
   1,724.80/2,588.82 = 1,231.70/x
3. Step 3: Cross multiply
   1,724.80x = 2,588.82 × 1,231.70
4. Step 4: Simplify right side
   1,724.80x = 3,188,649.59
5. Step 5: Solve for x
   x = 3,188,649.59/1,724.80
6. Step 6: Final answer
   x = 1,848.71