Finding the Third Proportional to 148,278 and 308,844

Step by Step Solution

1. Step 1: Write the proportion equation
   148,278 : 308,844 = 308,844 : x
2. Step 2: Convert to fraction form
   148,278/308,844 = 308,844/x
3. Step 3: Cross multiply
   148,278x = 308,844 × 308,844
4. Step 4: Simplify right side
   148,278x = 95,384,616,336
5. Step 5: Solve for x
   x = 95,384,616,336/148,278
6. Step 6: Final answer
   x = 643,282.32