Finding the Third Proportional to 5,430 and 10,188

Step by Step Solution

1. Step 1: Write the proportion equation
   5,430 : 10,188 = 10,188 : x
2. Step 2: Convert to fraction form
   5,430/10,188 = 10,188/x
3. Step 3: Cross multiply
   5,430x = 10,188 × 10,188
4. Step 4: Simplify right side
   5,430x = 103,795,344
5. Step 5: Solve for x
   x = 103,795,344/5,430
6. Step 6: Final answer
   x = 19,115.16