Finding the Third Proportional to 191,260 and 390,968

Step by Step Solution

1. Step 1: Write the proportion equation
   191,260 : 390,968 = 390,968 : x
2. Step 2: Convert to fraction form
   191,260/390,968 = 390,968/x
3. Step 3: Cross multiply
   191,260x = 390,968 × 390,968
4. Step 4: Simplify right side
   191,260x = 152,855,977,024
5. Step 5: Solve for x
   x = 152,855,977,024/191,260
6. Step 6: Final answer
   x = 799,205.15