Finding the Third Proportional to 111,154.50 and 243,391.50

Step by Step Solution

1. Step 1: Write the proportion equation
   111,154.50 : 243,391.50 = 243,391.50 : x
2. Step 2: Convert to fraction form
   111,154.50/243,391.50 = 243,391.50/x
3. Step 3: Cross multiply
   111,154.50x = 243,391.50 × 243,391.50
4. Step 4: Simplify right side
   111,154.50x = 59,239,422,272.25
5. Step 5: Solve for x
   x = 59,239,422,272.25/111,154.50
6. Step 6: Final answer
   x = 532,946.68