Finding the Third Proportional to 111,138 and 243,354

Step by Step Solution

1. Step 1: Write the proportion equation
   111,138 : 243,354 = 243,354 : x
2. Step 2: Convert to fraction form
   111,138/243,354 = 243,354/x
3. Step 3: Cross multiply
   111,138x = 243,354 × 243,354
4. Step 4: Simplify right side
   111,138x = 59,221,169,316
5. Step 5: Solve for x
   x = 59,221,169,316/111,138
6. Step 6: Final answer
   x = 532,861.57