Finding the Third Proportional to 400,522 and 619,956

Step by Step Solution

1. Step 1: Write the proportion equation
   400,522 : 619,956 = 619,956 : x
2. Step 2: Convert to fraction form
   400,522/619,956 = 619,956/x
3. Step 3: Cross multiply
   400,522x = 619,956 × 619,956
4. Step 4: Simplify right side
   400,522x = 384,345,441,936
5. Step 5: Solve for x
   x = 384,345,441,936/400,522
6. Step 6: Final answer
   x = 959,611.31