Finding the Third Proportional to 198,139.50 and 298,147.50

Step by Step Solution

1. Step 1: Write the proportion equation
   198,139.50 : 298,147.50 = 298,147.50 : x
2. Step 2: Convert to fraction form
   198,139.50/298,147.50 = 298,147.50/x
3. Step 3: Cross multiply
   198,139.50x = 298,147.50 × 298,147.50
4. Step 4: Simplify right side
   198,139.50x = 88,891,931,756.25
5. Step 5: Solve for x
   x = 88,891,931,756.25/198,139.50
6. Step 6: Final answer
   x = 448,633.07