Finding the Third Proportional to 86,647.50 and 187,510.50

Step by Step Solution

1. Step 1: Write the proportion equation
   86,647.50 : 187,510.50 = 187,510.50 : x
2. Step 2: Convert to fraction form
   86,647.50/187,510.50 = 187,510.50/x
3. Step 3: Cross multiply
   86,647.50x = 187,510.50 × 187,510.50
4. Step 4: Simplify right side
   86,647.50x = 35,160,187,610.25
5. Step 5: Solve for x
   x = 35,160,187,610.25/86,647.50
6. Step 6: Final answer
   x = 405,784.21