Finding the Fourth Proportional to 12,648.18, 18,876.39 and 12,353.34

Step by Step Solution

1. Step 1: Write the proportion equation
   12,648.18 : 18,876.39 = 12,353.34 : x
2. Step 2: Convert to fraction form
   12,648.18/18,876.39 = 12,353.34/x
3. Step 3: Cross multiply
   12,648.18x = 18,876.39 × 12,353.34
4. Step 4: Simplify right side
   12,648.18x = 233,186,463.64
5. Step 5: Solve for x
   x = 233,186,463.64/12,648.18
6. Step 6: Final answer
   x = 18,436.37