Finding the Fourth Proportional to 2,591.82, 3,887.37 and 836.60

Step by Step Solution

1. Step 1: Write the proportion equation
   2,591.82 : 3,887.37 = 836.60 : x
2. Step 2: Convert to fraction form
   2,591.82/3,887.37 = 836.60/x
3. Step 3: Cross multiply
   2,591.82x = 3,887.37 × 836.60
4. Step 4: Simplify right side
   2,591.82x = 3,252,154.31
5. Step 5: Solve for x
   x = 3,252,154.31/2,591.82
6. Step 6: Final answer
   x = 1,254.78