Finding the Third Proportional to 191,280 and 391,008

Step by Step Solution

1. Step 1: Write the proportion equation
   191,280 : 391,008 = 391,008 : x
2. Step 2: Convert to fraction form
   191,280/391,008 = 391,008/x
3. Step 3: Cross multiply
   191,280x = 391,008 × 391,008
4. Step 4: Simplify right side
   191,280x = 152,887,256,064
5. Step 5: Solve for x
   x = 152,887,256,064/191,280
6. Step 6: Final answer
   x = 799,285.11