Finding the Third Proportional to 111,662.30 and 243,400.57

Step by Step Solution

1. Step 1: Write the proportion equation
   111,662.30 : 243,400.57 = 243,400.57 : x
2. Step 2: Convert to fraction form
   111,662.30/243,400.57 = 243,400.57/x
3. Step 3: Cross multiply
   111,662.30x = 243,400.57 × 243,400.57
4. Step 4: Simplify right side
   111,662.30x = 59,243,837,628.45
5. Step 5: Solve for x
   x = 59,243,837,628.45/111,662.30
6. Step 6: Final answer
   x = 530,562.59