Finding the Third Proportional to 149,814 and 320,950.50

Step by Step Solution

1. Step 1: Write the proportion equation
   149,814 : 320,950.50 = 320,950.50 : x
2. Step 2: Convert to fraction form
   149,814/320,950.50 = 320,950.50/x
3. Step 3: Cross multiply
   149,814x = 320,950.50 × 320,950.50
4. Step 4: Simplify right side
   149,814x = 103,009,223,450.25
5. Step 5: Solve for x
   x = 103,009,223,450.25/149,814
6. Step 6: Final answer
   x = 687,580.76