Finding the Third Proportional to 191,268 and 390,984

Step by Step Solution

1. Step 1: Write the proportion equation
   191,268 : 390,984 = 390,984 : x
2. Step 2: Convert to fraction form
   191,268/390,984 = 390,984/x
3. Step 3: Cross multiply
   191,268x = 390,984 × 390,984
4. Step 4: Simplify right side
   191,268x = 152,868,488,256
5. Step 5: Solve for x
   x = 152,868,488,256/191,268
6. Step 6: Final answer
   x = 799,237.13