Finding the Third Proportional to 309,934.69 and 478,927.69

Step by Step Solution

1. Step 1: Write the proportion equation
   309,934.69 : 478,927.69 = 478,927.69 : x
2. Step 2: Convert to fraction form
   309,934.69/478,927.69 = 478,927.69/x
3. Step 3: Cross multiply
   309,934.69x = 478,927.69 × 478,927.69
4. Step 4: Simplify right side
   309,934.69x = 229,371,729,854.10
5. Step 5: Solve for x
   x = 229,371,729,854.10/309,934.69
6. Step 6: Final answer
   x = 740,064.73