Finding the Third Proportional to 149,848.50 and 320,950.50

Step by Step Solution

1. Step 1: Write the proportion equation
   149,848.50 : 320,950.50 = 320,950.50 : x
2. Step 2: Convert to fraction form
   149,848.50/320,950.50 = 320,950.50/x
3. Step 3: Cross multiply
   149,848.50x = 320,950.50 × 320,950.50
4. Step 4: Simplify right side
   149,848.50x = 103,009,223,450.25
5. Step 5: Solve for x
   x = 103,009,223,450.25/149,848.50
6. Step 6: Final answer
   x = 687,422.45