Finding the Fourth Proportional to 2,657.40, 3,986.12 and 1,486.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,657.40 : 3,986.12 = 1,486.72 : x
2. Step 2: Convert to fraction form
   2,657.40/3,986.12 = 1,486.72/x
3. Step 3: Cross multiply
   2,657.40x = 3,986.12 × 1,486.72
4. Step 4: Simplify right side
   2,657.40x = 5,926,244.33
5. Step 5: Solve for x
   x = 5,926,244.33/2,657.40
6. Step 6: Final answer
   x = 2,230.09