Finding the Third Proportional to 111,879.50 and 243,237.50

Step by Step Solution

1. Step 1: Write the proportion equation
   111,879.50 : 243,237.50 = 243,237.50 : x
2. Step 2: Convert to fraction form
   111,879.50/243,237.50 = 243,237.50/x
3. Step 3: Cross multiply
   111,879.50x = 243,237.50 × 243,237.50
4. Step 4: Simplify right side
   111,879.50x = 59,164,481,406.25
5. Step 5: Solve for x
   x = 59,164,481,406.25/111,879.50
6. Step 6: Final answer
   x = 528,823.26