Finding the Third Proportional to 30,238.50 and 64,851

Step by Step Solution

1. Step 1: Write the proportion equation
   30,238.50 : 64,851 = 64,851 : x
2. Step 2: Convert to fraction form
   30,238.50/64,851 = 64,851/x
3. Step 3: Cross multiply
   30,238.50x = 64,851 × 64,851
4. Step 4: Simplify right side
   30,238.50x = 4,205,652,201
5. Step 5: Solve for x
   x = 4,205,652,201/30,238.50
6. Step 6: Final answer
   x = 139,082.70