Finding the Third Proportional to 190,399.50 and 418,168.50

Step by Step Solution

1. Step 1: Write the proportion equation
   190,399.50 : 418,168.50 = 418,168.50 : x
2. Step 2: Convert to fraction form
   190,399.50/418,168.50 = 418,168.50/x
3. Step 3: Cross multiply
   190,399.50x = 418,168.50 × 418,168.50
4. Step 4: Simplify right side
   190,399.50x = 174,864,894,392.25
5. Step 5: Solve for x
   x = 174,864,894,392.25/190,399.50
6. Step 6: Final answer
   x = 918,410.47