Finding the Third Proportional to 31,282.31 and 67,485.75

Step by Step Solution

1. Step 1: Write the proportion equation
   31,282.31 : 67,485.75 = 67,485.75 : x
2. Step 2: Convert to fraction form
   31,282.31/67,485.75 = 67,485.75/x
3. Step 3: Cross multiply
   31,282.31x = 67,485.75 × 67,485.75
4. Step 4: Simplify right side
   31,282.31x = 4,554,326,453.06
5. Step 5: Solve for x
   x = 4,554,326,453.06/31,282.31
6. Step 6: Final answer
   x = 145,587.91