Finding the Third Proportional to 111,099 and 239,662.50

Step by Step Solution

1. Step 1: Write the proportion equation
   111,099 : 239,662.50 = 239,662.50 : x
2. Step 2: Convert to fraction form
   111,099/239,662.50 = 239,662.50/x
3. Step 3: Cross multiply
   111,099x = 239,662.50 × 239,662.50
4. Step 4: Simplify right side
   111,099x = 57,438,113,906.25
5. Step 5: Solve for x
   x = 57,438,113,906.25/111,099
6. Step 6: Final answer
   x = 516,999.38