Finding the Fourth Proportional to 18,196.66, 25,111.10 and 10,238.88

Step by Step Solution

1. Step 1: Write the proportion equation
   18,196.66 : 25,111.10 = 10,238.88 : x
2. Step 2: Convert to fraction form
   18,196.66/25,111.10 = 10,238.88/x
3. Step 3: Cross multiply
   18,196.66x = 25,111.10 × 10,238.88
4. Step 4: Simplify right side
   18,196.66x = 257,109,539.57
5. Step 5: Solve for x
   x = 257,109,539.57/18,196.66
6. Step 6: Final answer
   x = 14,129.49