Finding the Third Proportional to 300,878 and 423,336

Step by Step Solution

1. Step 1: Write the proportion equation
   300,878 : 423,336 = 423,336 : x
2. Step 2: Convert to fraction form
   300,878/423,336 = 423,336/x
3. Step 3: Cross multiply
   300,878x = 423,336 × 423,336
4. Step 4: Simplify right side
   300,878x = 179,213,368,896
5. Step 5: Solve for x
   x = 179,213,368,896/300,878
6. Step 6: Final answer
   x = 595,634.67