Finding the Fourth Proportional to 2,591.59, 3,888.14 and 836.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,591.59 : 3,888.14 = 836.56 : x
2. Step 2: Convert to fraction form
   2,591.59/3,888.14 = 836.56/x
3. Step 3: Cross multiply
   2,591.59x = 3,888.14 × 836.56
4. Step 4: Simplify right side
   2,591.59x = 3,252,638.77
5. Step 5: Solve for x
   x = 3,252,638.77/2,591.59
6. Step 6: Final answer
   x = 1,255.08