Finding the Third Proportional to 198,061.50 and 427,686

Step by Step Solution

1. Step 1: Write the proportion equation
   198,061.50 : 427,686 = 427,686 : x
2. Step 2: Convert to fraction form
   198,061.50/427,686 = 427,686/x
3. Step 3: Cross multiply
   198,061.50x = 427,686 × 427,686
4. Step 4: Simplify right side
   198,061.50x = 182,915,314,596
5. Step 5: Solve for x
   x = 182,915,314,596/198,061.50
6. Step 6: Final answer
   x = 923,527.87