Finding the Fourth Proportional to 1,725.90, 2,600.99 and 1,561.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,725.90 : 2,600.99 = 1,561.59 : x
2. Step 2: Convert to fraction form
   1,725.90/2,600.99 = 1,561.59/x
3. Step 3: Cross multiply
   1,725.90x = 2,600.99 × 1,561.59
4. Step 4: Simplify right side
   1,725.90x = 4,061,671.20
5. Step 5: Solve for x
   x = 4,061,671.20/1,725.90
6. Step 6: Final answer
   x = 2,353.37