Finding the Third Proportional to 34,123.50 and 69,939

Step by Step Solution

1. Step 1: Write the proportion equation
   34,123.50 : 69,939 = 69,939 : x
2. Step 2: Convert to fraction form
   34,123.50/69,939 = 69,939/x
3. Step 3: Cross multiply
   34,123.50x = 69,939 × 69,939
4. Step 4: Simplify right side
   34,123.50x = 4,891,463,721
5. Step 5: Solve for x
   x = 4,891,463,721/34,123.50
6. Step 6: Final answer
   x = 143,345.90