Finding the Fourth Proportional to 3,451.82, 5,172.86 and 2,586.74

Step by Step Solution

1. Step 1: Write the proportion equation
   3,451.82 : 5,172.86 = 2,586.74 : x
2. Step 2: Convert to fraction form
   3,451.82/5,172.86 = 2,586.74/x
3. Step 3: Cross multiply
   3,451.82x = 5,172.86 × 2,586.74
4. Step 4: Simplify right side
   3,451.82x = 13,380,824.48
5. Step 5: Solve for x
   x = 13,380,824.48/3,451.82
6. Step 6: Final answer
   x = 3,876.46