Finding the Third Proportional to 7,918.17 and 10,688.20

Step by Step Solution

1. Step 1: Write the proportion equation
   7,918.17 : 10,688.20 = 10,688.20 : x
2. Step 2: Convert to fraction form
   7,918.17/10,688.20 = 10,688.20/x
3. Step 3: Cross multiply
   7,918.17x = 10,688.20 × 10,688.20
4. Step 4: Simplify right side
   7,918.17x = 114,237,686.04
5. Step 5: Solve for x
   x = 114,237,686.04/7,918.17
6. Step 6: Final answer
   x = 14,427.28