Finding the Third Proportional to 199,617.50 and 301,505.50

Step by Step Solution

1. Step 1: Write the proportion equation
   199,617.50 : 301,505.50 = 301,505.50 : x
2. Step 2: Convert to fraction form
   199,617.50/301,505.50 = 301,505.50/x
3. Step 3: Cross multiply
   199,617.50x = 301,505.50 × 301,505.50
4. Step 4: Simplify right side
   199,617.50x = 90,905,566,530.25
5. Step 5: Solve for x
   x = 90,905,566,530.25/199,617.50
6. Step 6: Final answer
   x = 455,398.78