Finding the Third Proportional to 111,450 and 243,210

Step by Step Solution

1. Step 1: Write the proportion equation
   111,450 : 243,210 = 243,210 : x
2. Step 2: Convert to fraction form
   111,450/243,210 = 243,210/x
3. Step 3: Cross multiply
   111,450x = 243,210 × 243,210
4. Step 4: Simplify right side
   111,450x = 59,151,104,100
5. Step 5: Solve for x
   x = 59,151,104,100/111,450
6. Step 6: Final answer
   x = 530,741.18