Finding the Third Proportional to 372,147 and 815,215.50

Step by Step Solution

1. Step 1: Write the proportion equation
   372,147 : 815,215.50 = 815,215.50 : x
2. Step 2: Convert to fraction form
   372,147/815,215.50 = 815,215.50/x
3. Step 3: Cross multiply
   372,147x = 815,215.50 × 815,215.50
4. Step 4: Simplify right side
   372,147x = 664,576,311,440.25
5. Step 5: Solve for x
   x = 664,576,311,440.25/372,147
6. Step 6: Final answer
   x = 1,785,789.79