Finding the Third Proportional to 199,800 and 427,939.50

Step by Step Solution

1. Step 1: Write the proportion equation
   199,800 : 427,939.50 = 427,939.50 : x
2. Step 2: Convert to fraction form
   199,800/427,939.50 = 427,939.50/x
3. Step 3: Cross multiply
   199,800x = 427,939.50 × 427,939.50
4. Step 4: Simplify right side
   199,800x = 183,132,215,660.25
5. Step 5: Solve for x
   x = 183,132,215,660.25/199,800
6. Step 6: Final answer
   x = 916,577.66