Finding the Third Proportional to 253,740 and 551,215.50

Step by Step Solution

1. Step 1: Write the proportion equation
   253,740 : 551,215.50 = 551,215.50 : x
2. Step 2: Convert to fraction form
   253,740/551,215.50 = 551,215.50/x
3. Step 3: Cross multiply
   253,740x = 551,215.50 × 551,215.50
4. Step 4: Simplify right side
   253,740x = 303,838,527,440.25
5. Step 5: Solve for x
   x = 303,838,527,440.25/253,740
6. Step 6: Final answer
   x = 1,197,440.40