Finding the Third Proportional to 103,699 and 213,940

Step by Step Solution

1. Step 1: Write the proportion equation
   103,699 : 213,940 = 213,940 : x
2. Step 2: Convert to fraction form
   103,699/213,940 = 213,940/x
3. Step 3: Cross multiply
   103,699x = 213,940 × 213,940
4. Step 4: Simplify right side
   103,699x = 45,770,323,600
5. Step 5: Solve for x
   x = 45,770,323,600/103,699
6. Step 6: Final answer
   x = 441,376.71