Finding the Third Proportional to 111,500 and 240,490

Step by Step Solution

1. Step 1: Write the proportion equation
   111,500 : 240,490 = 240,490 : x
2. Step 2: Convert to fraction form
   111,500/240,490 = 240,490/x
3. Step 3: Cross multiply
   111,500x = 240,490 × 240,490
4. Step 4: Simplify right side
   111,500x = 57,835,440,100
5. Step 5: Solve for x
   x = 57,835,440,100/111,500
6. Step 6: Final answer
   x = 518,703.50