Finding the Third Proportional to 300,140 and 634,048

Step by Step Solution

1. Step 1: Write the proportion equation
   300,140 : 634,048 = 634,048 : x
2. Step 2: Convert to fraction form
   300,140/634,048 = 634,048/x
3. Step 3: Cross multiply
   300,140x = 634,048 × 634,048
4. Step 4: Simplify right side
   300,140x = 402,016,866,304
5. Step 5: Solve for x
   x = 402,016,866,304/300,140
6. Step 6: Final answer
   x = 1,339,431.15