Finding the Third Proportional to 191,276 and 391,000

Step by Step Solution

1. Step 1: Write the proportion equation
   191,276 : 391,000 = 391,000 : x
2. Step 2: Convert to fraction form
   191,276/391,000 = 391,000/x
3. Step 3: Cross multiply
   191,276x = 391,000 × 391,000
4. Step 4: Simplify right side
   191,276x = 152,881,000,000
5. Step 5: Solve for x
   x = 152,881,000,000/191,276
6. Step 6: Final answer
   x = 799,269.12