Finding the Fourth Proportional to 2,592.18, 3,887.06 and 859.59

Step by Step Solution

1. Step 1: Write the proportion equation
   2,592.18 : 3,887.06 = 859.59 : x
2. Step 2: Convert to fraction form
   2,592.18/3,887.06 = 859.59/x
3. Step 3: Cross multiply
   2,592.18x = 3,887.06 × 859.59
4. Step 4: Simplify right side
   2,592.18x = 3,341,273.61
5. Step 5: Solve for x
   x = 3,341,273.61/2,592.18
6. Step 6: Final answer
   x = 1,288.98