Finding the Fourth Proportional to 2,592.09, 3,887.29 and 860.25

Step by Step Solution

1. Step 1: Write the proportion equation
   2,592.09 : 3,887.29 = 860.25 : x
2. Step 2: Convert to fraction form
   2,592.09/3,887.29 = 860.25/x
3. Step 3: Cross multiply
   2,592.09x = 3,887.29 × 860.25
4. Step 4: Simplify right side
   2,592.09x = 3,344,041.22
5. Step 5: Solve for x
   x = 3,344,041.22/2,592.09
6. Step 6: Final answer
   x = 1,290.09