Finding the Third Proportional to 38,717 and 57,921.50

Step by Step Solution

1. Step 1: Write the proportion equation
   38,717 : 57,921.50 = 57,921.50 : x
2. Step 2: Convert to fraction form
   38,717/57,921.50 = 57,921.50/x
3. Step 3: Cross multiply
   38,717x = 57,921.50 × 57,921.50
4. Step 4: Simplify right side
   38,717x = 3,354,900,162.25
5. Step 5: Solve for x
   x = 3,354,900,162.25/38,717
6. Step 6: Final answer
   x = 86,651.86