Finding the Third Proportional to 172,111.50 and 372,816

Step by Step Solution

1. Step 1: Write the proportion equation
   172,111.50 : 372,816 = 372,816 : x
2. Step 2: Convert to fraction form
   172,111.50/372,816 = 372,816/x
3. Step 3: Cross multiply
   172,111.50x = 372,816 × 372,816
4. Step 4: Simplify right side
   172,111.50x = 138,991,769,856
5. Step 5: Solve for x
   x = 138,991,769,856/172,111.50
6. Step 6: Final answer
   x = 807,568.17