Finding the Third Proportional to 309,934 and 478,926

Step by Step Solution

1. Step 1: Write the proportion equation
   309,934 : 478,926 = 478,926 : x
2. Step 2: Convert to fraction form
   309,934/478,926 = 478,926/x
3. Step 3: Cross multiply
   309,934x = 478,926 × 478,926
4. Step 4: Simplify right side
   309,934x = 229,370,113,476
5. Step 5: Solve for x
   x = 229,370,113,476/309,934
6. Step 6: Final answer
   x = 740,061.15