Finding the Third Proportional to 109,431 and 235,209.50

Step by Step Solution

1. Step 1: Write the proportion equation
   109,431 : 235,209.50 = 235,209.50 : x
2. Step 2: Convert to fraction form
   109,431/235,209.50 = 235,209.50/x
3. Step 3: Cross multiply
   109,431x = 235,209.50 × 235,209.50
4. Step 4: Simplify right side
   109,431x = 55,323,508,890.25
5. Step 5: Solve for x
   x = 55,323,508,890.25/109,431
6. Step 6: Final answer
   x = 505,556.09