Finding the Third Proportional to 148,275 and 308,838

Step by Step Solution

1. Step 1: Write the proportion equation
   148,275 : 308,838 = 308,838 : x
2. Step 2: Convert to fraction form
   148,275/308,838 = 308,838/x
3. Step 3: Cross multiply
   148,275x = 308,838 × 308,838
4. Step 4: Simplify right side
   148,275x = 95,380,910,244
5. Step 5: Solve for x
   x = 95,380,910,244/148,275
6. Step 6: Final answer
   x = 643,270.34