Finding the Third Proportional to 31,806.50 and 66,228

Step by Step Solution

1. Step 1: Write the proportion equation
   31,806.50 : 66,228 = 66,228 : x
2. Step 2: Convert to fraction form
   31,806.50/66,228 = 66,228/x
3. Step 3: Cross multiply
   31,806.50x = 66,228 × 66,228
4. Step 4: Simplify right side
   31,806.50x = 4,386,147,984
5. Step 5: Solve for x
   x = 4,386,147,984/31,806.50
6. Step 6: Final answer
   x = 137,900.99