Finding the Third Proportional to 12,279.09 and 18,479.39

Step by Step Solution

1. Step 1: Write the proportion equation
   12,279.09 : 18,479.39 = 18,479.39 : x
2. Step 2: Convert to fraction form
   12,279.09/18,479.39 = 18,479.39/x
3. Step 3: Cross multiply
   12,279.09x = 18,479.39 × 18,479.39
4. Step 4: Simplify right side
   12,279.09x = 341,487,877.87
5. Step 5: Solve for x
   x = 341,487,877.87/12,279.09
6. Step 6: Final answer
   x = 27,810.51