Finding the Fourth Proportional to 2,592.46, 3,887.43 and 860.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,592.46 : 3,887.43 = 860.50 : x
2. Step 2: Convert to fraction form
   2,592.46/3,887.43 = 860.50/x
3. Step 3: Cross multiply
   2,592.46x = 3,887.43 × 860.50
4. Step 4: Simplify right side
   2,592.46x = 3,345,133.52
5. Step 5: Solve for x
   x = 3,345,133.52/2,592.46
6. Step 6: Final answer
   x = 1,290.33