Finding the Third Proportional to 137,620.50 and 207,816

Step by Step Solution

1. Step 1: Write the proportion equation
   137,620.50 : 207,816 = 207,816 : x
2. Step 2: Convert to fraction form
   137,620.50/207,816 = 207,816/x
3. Step 3: Cross multiply
   137,620.50x = 207,816 × 207,816
4. Step 4: Simplify right side
   137,620.50x = 43,187,489,856
5. Step 5: Solve for x
   x = 43,187,489,856/137,620.50
6. Step 6: Final answer
   x = 313,815.82