Finding the Third Proportional to 111,442 and 243,196

Step by Step Solution

1. Step 1: Write the proportion equation
   111,442 : 243,196 = 243,196 : x
2. Step 2: Convert to fraction form
   111,442/243,196 = 243,196/x
3. Step 3: Cross multiply
   111,442x = 243,196 × 243,196
4. Step 4: Simplify right side
   111,442x = 59,144,294,416
5. Step 5: Solve for x
   x = 59,144,294,416/111,442
6. Step 6: Final answer
   x = 530,718.17