Finding the Third Proportional to 111,889.50 and 243,454.50

Step by Step Solution

1. Step 1: Write the proportion equation
   111,889.50 : 243,454.50 = 243,454.50 : x
2. Step 2: Convert to fraction form
   111,889.50/243,454.50 = 243,454.50/x
3. Step 3: Cross multiply
   111,889.50x = 243,454.50 × 243,454.50
4. Step 4: Simplify right side
   111,889.50x = 59,270,093,570.25
5. Step 5: Solve for x
   x = 59,270,093,570.25/111,889.50
6. Step 6: Final answer
   x = 529,719.89