Finding the Fourth Proportional to 18,412.76, 25,401.52 and 12,442.25

Step by Step Solution

1. Step 1: Write the proportion equation
   18,412.76 : 25,401.52 = 12,442.25 : x
2. Step 2: Convert to fraction form
   18,412.76/25,401.52 = 12,442.25/x
3. Step 3: Cross multiply
   18,412.76x = 25,401.52 × 12,442.25
4. Step 4: Simplify right side
   18,412.76x = 316,052,062.22
5. Step 5: Solve for x
   x = 316,052,062.22/18,412.76
6. Step 6: Final answer
   x = 17,164.84