Finding the Third Proportional to 191,389.50 and 419,418

Step by Step Solution

1. Step 1: Write the proportion equation
   191,389.50 : 419,418 = 419,418 : x
2. Step 2: Convert to fraction form
   191,389.50/419,418 = 419,418/x
3. Step 3: Cross multiply
   191,389.50x = 419,418 × 419,418
4. Step 4: Simplify right side
   191,389.50x = 175,911,458,724
5. Step 5: Solve for x
   x = 175,911,458,724/191,389.50
6. Step 6: Final answer
   x = 919,128.05