Finding the Fourth Proportional to 14,279.18, 21,316.56 and 12,411.34

Step by Step Solution

1. Step 1: Write the proportion equation
   14,279.18 : 21,316.56 = 12,411.34 : x
2. Step 2: Convert to fraction form
   14,279.18/21,316.56 = 12,411.34/x
3. Step 3: Cross multiply
   14,279.18x = 21,316.56 × 12,411.34
4. Step 4: Simplify right side
   14,279.18x = 264,567,073.79
5. Step 5: Solve for x
   x = 264,567,073.79/14,279.18
6. Step 6: Final answer
   x = 18,528.17