Finding the Third Proportional to 8,916 and 13,870.50

Step by Step Solution

1. Step 1: Write the proportion equation
   8,916 : 13,870.50 = 13,870.50 : x
2. Step 2: Convert to fraction form
   8,916/13,870.50 = 13,870.50/x
3. Step 3: Cross multiply
   8,916x = 13,870.50 × 13,870.50
4. Step 4: Simplify right side
   8,916x = 192,390,770.25
5. Step 5: Solve for x
   x = 192,390,770.25/8,916
6. Step 6: Final answer
   x = 21,578.15