Finding the Fourth Proportional to 2,591.56, 3,886.98 and 836.74

Step by Step Solution

1. Step 1: Write the proportion equation
   2,591.56 : 3,886.98 = 836.74 : x
2. Step 2: Convert to fraction form
   2,591.56/3,886.98 = 836.74/x
3. Step 3: Cross multiply
   2,591.56x = 3,886.98 × 836.74
4. Step 4: Simplify right side
   2,591.56x = 3,252,391.65
5. Step 5: Solve for x
   x = 3,252,391.65/2,591.56
6. Step 6: Final answer
   x = 1,254.99