Finding the Third Proportional to 199,620 and 298,642.50

Step by Step Solution

1. Step 1: Write the proportion equation
   199,620 : 298,642.50 = 298,642.50 : x
2. Step 2: Convert to fraction form
   199,620/298,642.50 = 298,642.50/x
3. Step 3: Cross multiply
   199,620x = 298,642.50 × 298,642.50
4. Step 4: Simplify right side
   199,620x = 89,187,342,806.25
5. Step 5: Solve for x
   x = 89,187,342,806.25/199,620
6. Step 6: Final answer
   x = 446,785.61