Finding the Third Proportional to 145,701 and 317,038.50

Step by Step Solution

1. Step 1: Write the proportion equation
   145,701 : 317,038.50 = 317,038.50 : x
2. Step 2: Convert to fraction form
   145,701/317,038.50 = 317,038.50/x
3. Step 3: Cross multiply
   145,701x = 317,038.50 × 317,038.50
4. Step 4: Simplify right side
   145,701x = 100,513,410,482.25
5. Step 5: Solve for x
   x = 100,513,410,482.25/145,701
6. Step 6: Final answer
   x = 689,860.81