Finding the Third Proportional to 99,040.50 and 213,481.50

Step by Step Solution

1. Step 1: Write the proportion equation
   99,040.50 : 213,481.50 = 213,481.50 : x
2. Step 2: Convert to fraction form
   99,040.50/213,481.50 = 213,481.50/x
3. Step 3: Cross multiply
   99,040.50x = 213,481.50 × 213,481.50
4. Step 4: Simplify right side
   99,040.50x = 45,574,350,842.25
5. Step 5: Solve for x
   x = 45,574,350,842.25/99,040.50
6. Step 6: Final answer
   x = 460,158.73