Finding the Third Proportional to 68,458.50 and 147,028.50

Step by Step Solution

1. Step 1: Write the proportion equation
   68,458.50 : 147,028.50 = 147,028.50 : x
2. Step 2: Convert to fraction form
   68,458.50/147,028.50 = 147,028.50/x
3. Step 3: Cross multiply
   68,458.50x = 147,028.50 × 147,028.50
4. Step 4: Simplify right side
   68,458.50x = 21,617,379,812.25
5. Step 5: Solve for x
   x = 21,617,379,812.25/68,458.50
6. Step 6: Final answer
   x = 315,773.50