Finding the Third Proportional to 111,739 and 243,560

Step by Step Solution

1. Step 1: Write the proportion equation
   111,739 : 243,560 = 243,560 : x
2. Step 2: Convert to fraction form
   111,739/243,560 = 243,560/x
3. Step 3: Cross multiply
   111,739x = 243,560 × 243,560
4. Step 4: Simplify right side
   111,739x = 59,321,473,600
5. Step 5: Solve for x
   x = 59,321,473,600/111,739
6. Step 6: Final answer
   x = 530,893.19