Finding the Third Proportional to 8,587 and 13,607.50

Step by Step Solution

1. Step 1: Write the proportion equation
   8,587 : 13,607.50 = 13,607.50 : x
2. Step 2: Convert to fraction form
   8,587/13,607.50 = 13,607.50/x
3. Step 3: Cross multiply
   8,587x = 13,607.50 × 13,607.50
4. Step 4: Simplify right side
   8,587x = 185,164,056.25
5. Step 5: Solve for x
   x = 185,164,056.25/8,587
6. Step 6: Final answer
   x = 21,563.30