Finding the Third Proportional to 149,809.50 and 320,942.25

Step by Step Solution

1. Step 1: Write the proportion equation
   149,809.50 : 320,942.25 = 320,942.25 : x
2. Step 2: Convert to fraction form
   149,809.50/320,942.25 = 320,942.25/x
3. Step 3: Cross multiply
   149,809.50x = 320,942.25 × 320,942.25
4. Step 4: Simplify right side
   149,809.50x = 103,003,927,835.06
5. Step 5: Solve for x
   x = 103,003,927,835.06/149,809.50
6. Step 6: Final answer
   x = 687,566.06