Finding the Third Proportional to 13,187.81 and 20,346.19

Step by Step Solution

1. Step 1: Write the proportion equation
   13,187.81 : 20,346.19 = 20,346.19 : x
2. Step 2: Convert to fraction form
   13,187.81/20,346.19 = 20,346.19/x
3. Step 3: Cross multiply
   13,187.81x = 20,346.19 × 20,346.19
4. Step 4: Simplify right side
   13,187.81x = 413,967,345.79
5. Step 5: Solve for x
   x = 413,967,345.79/13,187.81
6. Step 6: Final answer
   x = 31,390.14