Finding the Third Proportional to 508,942 and 788,443

Step by Step Solution

1. Step 1: Write the proportion equation
   508,942 : 788,443 = 788,443 : x
2. Step 2: Convert to fraction form
   508,942/788,443 = 788,443/x
3. Step 3: Cross multiply
   508,942x = 788,443 × 788,443
4. Step 4: Simplify right side
   508,942x = 621,642,364,249
5. Step 5: Solve for x
   x = 621,642,364,249/508,942
6. Step 6: Final answer
   x = 1,221,440.49