Finding the Third Proportional to 31,081.50 and 66,525.75

Step by Step Solution

1. Step 1: Write the proportion equation
   31,081.50 : 66,525.75 = 66,525.75 : x
2. Step 2: Convert to fraction form
   31,081.50/66,525.75 = 66,525.75/x
3. Step 3: Cross multiply
   31,081.50x = 66,525.75 × 66,525.75
4. Step 4: Simplify right side
   31,081.50x = 4,425,675,413.06
5. Step 5: Solve for x
   x = 4,425,675,413.06/31,081.50
6. Step 6: Final answer
   x = 142,389.38