Finding the Third Proportional to 190,390.50 and 389,650.50

Step by Step Solution

1. Step 1: Write the proportion equation
   190,390.50 : 389,650.50 = 389,650.50 : x
2. Step 2: Convert to fraction form
   190,390.50/389,650.50 = 389,650.50/x
3. Step 3: Cross multiply
   190,390.50x = 389,650.50 × 389,650.50
4. Step 4: Simplify right side
   190,390.50x = 151,827,512,150.25
5. Step 5: Solve for x
   x = 151,827,512,150.25/190,390.50
6. Step 6: Final answer
   x = 797,453.19