Finding the Third Proportional to 31,590.84 and 68,718.38

Step by Step Solution

1. Step 1: Write the proportion equation
   31,590.84 : 68,718.38 = 68,718.38 : x
2. Step 2: Convert to fraction form
   31,590.84/68,718.38 = 68,718.38/x
3. Step 3: Cross multiply
   31,590.84x = 68,718.38 × 68,718.38
4. Step 4: Simplify right side
   31,590.84x = 4,722,215,062.64
5. Step 5: Solve for x
   x = 4,722,215,062.64/31,590.84
6. Step 6: Final answer
   x = 149,480.50