Finding the Third Proportional to 148,290 and 308,868

Step by Step Solution

1. Step 1: Write the proportion equation
   148,290 : 308,868 = 308,868 : x
2. Step 2: Convert to fraction form
   148,290/308,868 = 308,868/x
3. Step 3: Cross multiply
   148,290x = 308,868 × 308,868
4. Step 4: Simplify right side
   148,290x = 95,399,441,424
5. Step 5: Solve for x
   x = 95,399,441,424/148,290
6. Step 6: Final answer
   x = 643,330.24