Finding the Third Proportional to 31,799.25 and 69,369.75

Step by Step Solution

1. Step 1: Write the proportion equation
   31,799.25 : 69,369.75 = 69,369.75 : x
2. Step 2: Convert to fraction form
   31,799.25/69,369.75 = 69,369.75/x
3. Step 3: Cross multiply
   31,799.25x = 69,369.75 × 69,369.75
4. Step 4: Simplify right side
   31,799.25x = 4,812,162,215.06
5. Step 5: Solve for x
   x = 4,812,162,215.06/31,799.25
6. Step 6: Final answer
   x = 151,329.42