Finding the Fourth Proportional to 2,591.13, 3,888.35 and 2,581.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,591.13 : 3,888.35 = 2,581.56 : x
2. Step 2: Convert to fraction form
   2,591.13/3,888.35 = 2,581.56/x
3. Step 3: Cross multiply
   2,591.13x = 3,888.35 × 2,581.56
4. Step 4: Simplify right side
   2,591.13x = 10,038,014.65
5. Step 5: Solve for x
   x = 10,038,014.65/2,591.13
6. Step 6: Final answer
   x = 3,874.00