Finding the Fourth Proportional to 18,111.30, 25,373.10 and 18,111.30

Step by Step Solution

1. Step 1: Write the proportion equation
   18,111.30 : 25,373.10 = 18,111.30 : x
2. Step 2: Convert to fraction form
   18,111.30/25,373.10 = 18,111.30/x
3. Step 3: Cross multiply
   18,111.30x = 25,373.10 × 18,111.30
4. Step 4: Simplify right side
   18,111.30x = 459,539,826.03
5. Step 5: Solve for x
   x = 459,539,826.03/18,111.30
6. Step 6: Final answer
   x = 25,373.10