Finding the Fourth Proportional to 18,478.50, 25,501.42 and 10,521.06

Step by Step Solution

1. Step 1: Write the proportion equation
   18,478.50 : 25,501.42 = 10,521.06 : x
2. Step 2: Convert to fraction form
   18,478.50/25,501.42 = 10,521.06/x
3. Step 3: Cross multiply
   18,478.50x = 25,501.42 × 10,521.06
4. Step 4: Simplify right side
   18,478.50x = 268,301,969.91
5. Step 5: Solve for x
   x = 268,301,969.91/18,478.50
6. Step 6: Final answer
   x = 14,519.68