Finding the Third Proportional to 187,731 and 402,171.75

Step by Step Solution

1. Step 1: Write the proportion equation
   187,731 : 402,171.75 = 402,171.75 : x
2. Step 2: Convert to fraction form
   187,731/402,171.75 = 402,171.75/x
3. Step 3: Cross multiply
   187,731x = 402,171.75 × 402,171.75
4. Step 4: Simplify right side
   187,731x = 161,742,116,498.06
5. Step 5: Solve for x
   x = 161,742,116,498.06/187,731
6. Step 6: Final answer
   x = 861,563.18