Finding the Fourth Proportional to 13,180.50, 19,818.17 and 12,153.06

Step by Step Solution

1. Step 1: Write the proportion equation
   13,180.50 : 19,818.17 = 12,153.06 : x
2. Step 2: Convert to fraction form
   13,180.50/19,818.17 = 12,153.06/x
3. Step 3: Cross multiply
   13,180.50x = 19,818.17 × 12,153.06
4. Step 4: Simplify right side
   13,180.50x = 240,851,348.33
5. Step 5: Solve for x
   x = 240,851,348.33/13,180.50
6. Step 6: Final answer
   x = 18,273.31