Finding the Third Proportional to 493,215 and 668,380.50

Step by Step Solution

1. Step 1: Write the proportion equation
   493,215 : 668,380.50 = 668,380.50 : x
2. Step 2: Convert to fraction form
   493,215/668,380.50 = 668,380.50/x
3. Step 3: Cross multiply
   493,215x = 668,380.50 × 668,380.50
4. Step 4: Simplify right side
   493,215x = 446,732,492,780.25
5. Step 5: Solve for x
   x = 446,732,492,780.25/493,215
6. Step 6: Final answer
   x = 905,756.10