Finding the Third Proportional to 12,609.42 and 18,931.22

Step by Step Solution

1. Step 1: Write the proportion equation
   12,609.42 : 18,931.22 = 18,931.22 : x
2. Step 2: Convert to fraction form
   12,609.42/18,931.22 = 18,931.22/x
3. Step 3: Cross multiply
   12,609.42x = 18,931.22 × 18,931.22
4. Step 4: Simplify right side
   12,609.42x = 358,391,043.36
5. Step 5: Solve for x
   x = 358,391,043.36/12,609.42
6. Step 6: Final answer
   x = 28,422.48