Finding the Third Proportional to 275,568 and 390,037.50

Step by Step Solution

1. Step 1: Write the proportion equation
   275,568 : 390,037.50 = 390,037.50 : x
2. Step 2: Convert to fraction form
   275,568/390,037.50 = 390,037.50/x
3. Step 3: Cross multiply
   275,568x = 390,037.50 × 390,037.50
4. Step 4: Simplify right side
   275,568x = 152,129,251,406.25
5. Step 5: Solve for x
   x = 152,129,251,406.25/275,568
6. Step 6: Final answer
   x = 552,057.03