Finding the Third Proportional to 111,390 and 235,200

Step by Step Solution

1. Step 1: Write the proportion equation
   111,390 : 235,200 = 235,200 : x
2. Step 2: Convert to fraction form
   111,390/235,200 = 235,200/x
3. Step 3: Cross multiply
   111,390x = 235,200 × 235,200
4. Step 4: Simplify right side
   111,390x = 55,319,040,000
5. Step 5: Solve for x
   x = 55,319,040,000/111,390
6. Step 6: Final answer
   x = 496,624.83