Finding the Third Proportional to 172,099.50 and 372,801.50

Step by Step Solution

1. Step 1: Write the proportion equation
   172,099.50 : 372,801.50 = 372,801.50 : x
2. Step 2: Convert to fraction form
   172,099.50/372,801.50 = 372,801.50/x
3. Step 3: Cross multiply
   172,099.50x = 372,801.50 × 372,801.50
4. Step 4: Simplify right side
   172,099.50x = 138,980,958,402.25
5. Step 5: Solve for x
   x = 138,980,958,402.25/172,099.50
6. Step 6: Final answer
   x = 807,561.66