Finding the Third Proportional to 111,559.50 and 243,423

Step by Step Solution

1. Step 1: Write the proportion equation
   111,559.50 : 243,423 = 243,423 : x
2. Step 2: Convert to fraction form
   111,559.50/243,423 = 243,423/x
3. Step 3: Cross multiply
   111,559.50x = 243,423 × 243,423
4. Step 4: Simplify right side
   111,559.50x = 59,254,756,929
5. Step 5: Solve for x
   x = 59,254,756,929/111,559.50
6. Step 6: Final answer
   x = 531,149.36