Finding the Fourth Proportional to 2,686.32, 4,019.76 and 2,621.52

Step by Step Solution

1. Step 1: Write the proportion equation
   2,686.32 : 4,019.76 = 2,621.52 : x
2. Step 2: Convert to fraction form
   2,686.32/4,019.76 = 2,621.52/x
3. Step 3: Cross multiply
   2,686.32x = 4,019.76 × 2,621.52
4. Step 4: Simplify right side
   2,686.32x = 10,537,881.24
5. Step 5: Solve for x
   x = 10,537,881.24/2,686.32
6. Step 6: Final answer
   x = 3,922.79