Finding the Third Proportional to 128,349 and 199,523.50

Step by Step Solution

1. Step 1: Write the proportion equation
   128,349 : 199,523.50 = 199,523.50 : x
2. Step 2: Convert to fraction form
   128,349/199,523.50 = 199,523.50/x
3. Step 3: Cross multiply
   128,349x = 199,523.50 × 199,523.50
4. Step 4: Simplify right side
   128,349x = 39,809,627,052.25
5. Step 5: Solve for x
   x = 39,809,627,052.25/128,349
6. Step 6: Final answer
   x = 310,167.02