Finding the Third Proportional to 309,248 and 441,040

Step by Step Solution

1. Step 1: Write the proportion equation
   309,248 : 441,040 = 441,040 : x
2. Step 2: Convert to fraction form
   309,248/441,040 = 441,040/x
3. Step 3: Cross multiply
   309,248x = 441,040 × 441,040
4. Step 4: Simplify right side
   309,248x = 194,516,281,600
5. Step 5: Solve for x
   x = 194,516,281,600/309,248
6. Step 6: Final answer
   x = 628,997.70