Finding the Third Proportional to 187,731 and 390,993.75

Step by Step Solution

1. Step 1: Write the proportion equation
   187,731 : 390,993.75 = 390,993.75 : x
2. Step 2: Convert to fraction form
   187,731/390,993.75 = 390,993.75/x
3. Step 3: Cross multiply
   187,731x = 390,993.75 × 390,993.75
4. Step 4: Simplify right side
   187,731x = 152,876,112,539.06
5. Step 5: Solve for x
   x = 152,876,112,539.06/187,731
6. Step 6: Final answer
   x = 814,336.00