Finding the Third Proportional to 31,900.36 and 69,906.09

Step by Step Solution

1. Step 1: Write the proportion equation
   31,900.36 : 69,906.09 = 69,906.09 : x
2. Step 2: Convert to fraction form
   31,900.36/69,906.09 = 69,906.09/x
3. Step 3: Cross multiply
   31,900.36x = 69,906.09 × 69,906.09
4. Step 4: Simplify right side
   31,900.36x = 4,886,861,943.38
5. Step 5: Solve for x
   x = 4,886,861,943.38/31,900.36
6. Step 6: Final answer
   x = 153,191.44