Finding the Fourth Proportional to 3,764.78, 5,189.98 and 2,642.24

Step by Step Solution

1. Step 1: Write the proportion equation
   3,764.78 : 5,189.98 = 2,642.24 : x
2. Step 2: Convert to fraction form
   3,764.78/5,189.98 = 2,642.24/x
3. Step 3: Cross multiply
   3,764.78x = 5,189.98 × 2,642.24
4. Step 4: Simplify right side
   3,764.78x = 13,713,172.76
5. Step 5: Solve for x
   x = 13,713,172.76/3,764.78
6. Step 6: Final answer
   x = 3,642.49