Finding the Third Proportional to 12,904.31 and 20,531.81

Step by Step Solution

1. Step 1: Write the proportion equation
   12,904.31 : 20,531.81 = 20,531.81 : x
2. Step 2: Convert to fraction form
   12,904.31/20,531.81 = 20,531.81/x
3. Step 3: Cross multiply
   12,904.31x = 20,531.81 × 20,531.81
4. Step 4: Simplify right side
   12,904.31x = 421,555,324.54
5. Step 5: Solve for x
   x = 421,555,324.54/12,904.31
6. Step 6: Final answer
   x = 32,667.79