Finding the Third Proportional to 51,219 and 111,699

Step by Step Solution

1. Step 1: Write the proportion equation
   51,219 : 111,699 = 111,699 : x
2. Step 2: Convert to fraction form
   51,219/111,699 = 111,699/x
3. Step 3: Cross multiply
   51,219x = 111,699 × 111,699
4. Step 4: Simplify right side
   51,219x = 12,476,666,601
5. Step 5: Solve for x
   x = 12,476,666,601/51,219
6. Step 6: Final answer
   x = 243,594.50