Finding the Fourth Proportional to 2,620.52, 3,924.29 and 1,521.55

Step by Step Solution

1. Step 1: Write the proportion equation
   2,620.52 : 3,924.29 = 1,521.55 : x
2. Step 2: Convert to fraction form
   2,620.52/3,924.29 = 1,521.55/x
3. Step 3: Cross multiply
   2,620.52x = 3,924.29 × 1,521.55
4. Step 4: Simplify right side
   2,620.52x = 5,971,003.45
5. Step 5: Solve for x
   x = 5,971,003.45/2,620.52
6. Step 6: Final answer
   x = 2,278.56