Finding the Fourth Proportional to 18,105.30, 25,364.70 and 18,105.30

Step by Step Solution

1. Step 1: Write the proportion equation
   18,105.30 : 25,364.70 = 18,105.30 : x
2. Step 2: Convert to fraction form
   18,105.30/25,364.70 = 18,105.30/x
3. Step 3: Cross multiply
   18,105.30x = 25,364.70 × 18,105.30
4. Step 4: Simplify right side
   18,105.30x = 459,235,502.91
5. Step 5: Solve for x
   x = 459,235,502.91/18,105.30
6. Step 6: Final answer
   x = 25,364.70