Finding the Fourth Proportional to 3,914.74, 5,402.59 and 2,586.12

Step by Step Solution

1. Step 1: Write the proportion equation
   3,914.74 : 5,402.59 = 2,586.12 : x
2. Step 2: Convert to fraction form
   3,914.74/5,402.59 = 2,586.12/x
3. Step 3: Cross multiply
   3,914.74x = 5,402.59 × 2,586.12
4. Step 4: Simplify right side
   3,914.74x = 13,971,733.87
5. Step 5: Solve for x
   x = 13,971,733.87/3,914.74
6. Step 6: Final answer
   x = 3,569.01