Finding the Third Proportional to 31,643.16 and 68,290.59

Step by Step Solution

1. Step 1: Write the proportion equation
   31,643.16 : 68,290.59 = 68,290.59 : x
2. Step 2: Convert to fraction form
   31,643.16/68,290.59 = 68,290.59/x
3. Step 3: Cross multiply
   31,643.16x = 68,290.59 × 68,290.59
4. Step 4: Simplify right side
   31,643.16x = 4,663,605,194.73
5. Step 5: Solve for x
   x = 4,663,605,194.73/31,643.16
6. Step 6: Final answer
   x = 147,381.16