Finding the Third Proportional to 68,172 and 145,819.50

Step by Step Solution

1. Step 1: Write the proportion equation
   68,172 : 145,819.50 = 145,819.50 : x
2. Step 2: Convert to fraction form
   68,172/145,819.50 = 145,819.50/x
3. Step 3: Cross multiply
   68,172x = 145,819.50 × 145,819.50
4. Step 4: Simplify right side
   68,172x = 21,263,326,580.25
5. Step 5: Solve for x
   x = 21,263,326,580.25/68,172
6. Step 6: Final answer
   x = 311,907.04