Finding the Third Proportional to 309,068 and 715,496

Step by Step Solution

1. Step 1: Write the proportion equation
   309,068 : 715,496 = 715,496 : x
2. Step 2: Convert to fraction form
   309,068/715,496 = 715,496/x
3. Step 3: Cross multiply
   309,068x = 715,496 × 715,496
4. Step 4: Simplify right side
   309,068x = 511,934,526,016
5. Step 5: Solve for x
   x = 511,934,526,016/309,068
6. Step 6: Final answer
   x = 1,656,381.53