Finding the Fourth Proportional to 1,720.25, 2,581.52 and 1,488.79

Step by Step Solution

1. Step 1: Write the proportion equation
   1,720.25 : 2,581.52 = 1,488.79 : x
2. Step 2: Convert to fraction form
   1,720.25/2,581.52 = 1,488.79/x
3. Step 3: Cross multiply
   1,720.25x = 2,581.52 × 1,488.79
4. Step 4: Simplify right side
   1,720.25x = 3,843,327.26
5. Step 5: Solve for x
   x = 3,843,327.26/1,720.25
6. Step 6: Final answer
   x = 2,234.17