Finding the Third Proportional to 153,605.25 and 317,866.50

Step by Step Solution

1. Step 1: Write the proportion equation
   153,605.25 : 317,866.50 = 317,866.50 : x
2. Step 2: Convert to fraction form
   153,605.25/317,866.50 = 317,866.50/x
3. Step 3: Cross multiply
   153,605.25x = 317,866.50 × 317,866.50
4. Step 4: Simplify right side
   153,605.25x = 101,039,111,822.25
5. Step 5: Solve for x
   x = 101,039,111,822.25/153,605.25
6. Step 6: Final answer
   x = 657,784.23