Finding the Third Proportional to 111,688 and 240,871

Step by Step Solution

1. Step 1: Write the proportion equation
   111,688 : 240,871 = 240,871 : x
2. Step 2: Convert to fraction form
   111,688/240,871 = 240,871/x
3. Step 3: Cross multiply
   111,688x = 240,871 × 240,871
4. Step 4: Simplify right side
   111,688x = 58,018,838,641
5. Step 5: Solve for x
   x = 58,018,838,641/111,688
6. Step 6: Final answer
   x = 519,472.45