Finding the Third Proportional to 34,249.50 and 69,439.50

Step by Step Solution

1. Step 1: Write the proportion equation
   34,249.50 : 69,439.50 = 69,439.50 : x
2. Step 2: Convert to fraction form
   34,249.50/69,439.50 = 69,439.50/x
3. Step 3: Cross multiply
   34,249.50x = 69,439.50 × 69,439.50
4. Step 4: Simplify right side
   34,249.50x = 4,821,844,160.25
5. Step 5: Solve for x
   x = 4,821,844,160.25/34,249.50
6. Step 6: Final answer
   x = 140,785.83