Finding the Third Proportional to 111,438 and 243,187

Step by Step Solution

1. Step 1: Write the proportion equation
   111,438 : 243,187 = 243,187 : x
2. Step 2: Convert to fraction form
   111,438/243,187 = 243,187/x
3. Step 3: Cross multiply
   111,438x = 243,187 × 243,187
4. Step 4: Simplify right side
   111,438x = 59,139,916,969
5. Step 5: Solve for x
   x = 59,139,916,969/111,438
6. Step 6: Final answer
   x = 530,697.94