Finding the Third Proportional to 111,436 and 243,199

Step by Step Solution

1. Step 1: Write the proportion equation
   111,436 : 243,199 = 243,199 : x
2. Step 2: Convert to fraction form
   111,436/243,199 = 243,199/x
3. Step 3: Cross multiply
   111,436x = 243,199 × 243,199
4. Step 4: Simplify right side
   111,436x = 59,145,753,601
5. Step 5: Solve for x
   x = 59,145,753,601/111,436
6. Step 6: Final answer
   x = 530,759.84