Finding the Third Proportional to 13,111.31 and 20,451.94

Step by Step Solution

1. Step 1: Write the proportion equation
   13,111.31 : 20,451.94 = 20,451.94 : x
2. Step 2: Convert to fraction form
   13,111.31/20,451.94 = 20,451.94/x
3. Step 3: Cross multiply
   13,111.31x = 20,451.94 × 20,451.94
4. Step 4: Simplify right side
   13,111.31x = 418,281,747.50
5. Step 5: Solve for x
   x = 418,281,747.50/13,111.31
6. Step 6: Final answer
   x = 31,902.36