Finding the Fourth Proportional to 13,524.71, 18,654.71 and 12,409.34

Step by Step Solution

1. Step 1: Write the proportion equation
   13,524.71 : 18,654.71 = 12,409.34 : x
2. Step 2: Convert to fraction form
   13,524.71/18,654.71 = 12,409.34/x
3. Step 3: Cross multiply
   13,524.71x = 18,654.71 × 12,409.34
4. Step 4: Simplify right side
   13,524.71x = 231,492,483.67
5. Step 5: Solve for x
   x = 231,492,483.67/13,524.71
6. Step 6: Final answer
   x = 17,116.27