Finding the Third Proportional to 69,703.50 and 148,399.50

Step by Step Solution

1. Step 1: Write the proportion equation
   69,703.50 : 148,399.50 = 148,399.50 : x
2. Step 2: Convert to fraction form
   69,703.50/148,399.50 = 148,399.50/x
3. Step 3: Cross multiply
   69,703.50x = 148,399.50 × 148,399.50
4. Step 4: Simplify right side
   69,703.50x = 22,022,411,600.25
5. Step 5: Solve for x
   x = 22,022,411,600.25/69,703.50
6. Step 6: Final answer
   x = 315,944.13