Finding the Third Proportional to 111,816 and 243,316

Step by Step Solution

1. Step 1: Write the proportion equation
   111,816 : 243,316 = 243,316 : x
2. Step 2: Convert to fraction form
   111,816/243,316 = 243,316/x
3. Step 3: Cross multiply
   111,816x = 243,316 × 243,316
4. Step 4: Simplify right side
   111,816x = 59,202,675,856
5. Step 5: Solve for x
   x = 59,202,675,856/111,816
6. Step 6: Final answer
   x = 529,465.16