Finding the Third Proportional to 300,836 and 399,333

Step by Step Solution

1. Step 1: Write the proportion equation
   300,836 : 399,333 = 399,333 : x
2. Step 2: Convert to fraction form
   300,836/399,333 = 399,333/x
3. Step 3: Cross multiply
   300,836x = 399,333 × 399,333
4. Step 4: Simplify right side
   300,836x = 159,466,844,889
5. Step 5: Solve for x
   x = 159,466,844,889/300,836
6. Step 6: Final answer
   x = 530,079.00