Finding the Third Proportional to 42,710 and 66,806.50

Step by Step Solution

1. Step 1: Write the proportion equation
   42,710 : 66,806.50 = 66,806.50 : x
2. Step 2: Convert to fraction form
   42,710/66,806.50 = 66,806.50/x
3. Step 3: Cross multiply
   42,710x = 66,806.50 × 66,806.50
4. Step 4: Simplify right side
   42,710x = 4,463,108,442.25
5. Step 5: Solve for x
   x = 4,463,108,442.25/42,710
6. Step 6: Final answer
   x = 104,497.97