Finding the Fourth Proportional to 18,189.01, 25,101.86 and 12,128.79

Step by Step Solution

1. Step 1: Write the proportion equation
   18,189.01 : 25,101.86 = 12,128.79 : x
2. Step 2: Convert to fraction form
   18,189.01/25,101.86 = 12,128.79/x
3. Step 3: Cross multiply
   18,189.01x = 25,101.86 × 12,128.79
4. Step 4: Simplify right side
   18,189.01x = 304,455,188.55
5. Step 5: Solve for x
   x = 304,455,188.55/18,189.01
6. Step 6: Final answer
   x = 16,738.41