Finding the Third Proportional to 12,886.50 and 14,218.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,886.50 : 14,218.50 = 14,218.50 : x
2. Step 2: Convert to fraction form
   12,886.50/14,218.50 = 14,218.50/x
3. Step 3: Cross multiply
   12,886.50x = 14,218.50 × 14,218.50
4. Step 4: Simplify right side
   12,886.50x = 202,165,742.25
5. Step 5: Solve for x
   x = 202,165,742.25/12,886.50
6. Step 6: Final answer
   x = 15,688.18