Finding the Third Proportional to 187,434 and 408,123.56

Step by Step Solution

1. Step 1: Write the proportion equation
   187,434 : 408,123.56 = 408,123.56 : x
2. Step 2: Convert to fraction form
   187,434/408,123.56 = 408,123.56/x
3. Step 3: Cross multiply
   187,434x = 408,123.56 × 408,123.56
4. Step 4: Simplify right side
   187,434x = 166,564,842,267.69
5. Step 5: Solve for x
   x = 166,564,842,267.69/187,434
6. Step 6: Final answer
   x = 888,658.63