Finding the Third Proportional to 145,667.25 and 317,812.50

Step by Step Solution

1. Step 1: Write the proportion equation
   145,667.25 : 317,812.50 = 317,812.50 : x
2. Step 2: Convert to fraction form
   145,667.25/317,812.50 = 317,812.50/x
3. Step 3: Cross multiply
   145,667.25x = 317,812.50 × 317,812.50
4. Step 4: Simplify right side
   145,667.25x = 101,004,785,156.25
5. Step 5: Solve for x
   x = 101,004,785,156.25/145,667.25
6. Step 6: Final answer
   x = 693,393.92