Finding the Fourth Proportional to 3,642.42, 5,019.54 and 2,521.28

Step by Step Solution

1. Step 1: Write the proportion equation
   3,642.42 : 5,019.54 = 2,521.28 : x
2. Step 2: Convert to fraction form
   3,642.42/5,019.54 = 2,521.28/x
3. Step 3: Cross multiply
   3,642.42x = 5,019.54 × 2,521.28
4. Step 4: Simplify right side
   3,642.42x = 12,655,661.94
5. Step 5: Solve for x
   x = 12,655,661.94/3,642.42
6. Step 6: Final answer
   x = 3,474.52