Finding the Third Proportional to 111,640 and 240,772

Step by Step Solution

1. Step 1: Write the proportion equation
   111,640 : 240,772 = 240,772 : x
2. Step 2: Convert to fraction form
   111,640/240,772 = 240,772/x
3. Step 3: Cross multiply
   111,640x = 240,772 × 240,772
4. Step 4: Simplify right side
   111,640x = 57,971,155,984
5. Step 5: Solve for x
   x = 57,971,155,984/111,640
6. Step 6: Final answer
   x = 519,268.68