Finding the Fourth Proportional to 2,642.18, 3,967.37 and 2,525.32

Step by Step Solution

1. Step 1: Write the proportion equation
   2,642.18 : 3,967.37 = 2,525.32 : x
2. Step 2: Convert to fraction form
   2,642.18/3,967.37 = 2,525.32/x
3. Step 3: Cross multiply
   2,642.18x = 3,967.37 × 2,525.32
4. Step 4: Simplify right side
   2,642.18x = 10,018,878.81
5. Step 5: Solve for x
   x = 10,018,878.81/2,642.18
6. Step 6: Final answer
   x = 3,791.90