Finding the Third Proportional to 61,170 and 86,140.50

Step by Step Solution

1. Step 1: Write the proportion equation
   61,170 : 86,140.50 = 86,140.50 : x
2. Step 2: Convert to fraction form
   61,170/86,140.50 = 86,140.50/x
3. Step 3: Cross multiply
   61,170x = 86,140.50 × 86,140.50
4. Step 4: Simplify right side
   61,170x = 7,420,185,740.25
5. Step 5: Solve for x
   x = 7,420,185,740.25/61,170
6. Step 6: Final answer
   x = 121,304.33