Finding the Third Proportional to 12,172 and 19,178

Step by Step Solution

1. Step 1: Write the proportion equation
   12,172 : 19,178 = 19,178 : x
2. Step 2: Convert to fraction form
   12,172/19,178 = 19,178/x
3. Step 3: Cross multiply
   12,172x = 19,178 × 19,178
4. Step 4: Simplify right side
   12,172x = 367,795,684
5. Step 5: Solve for x
   x = 367,795,684/12,172
6. Step 6: Final answer
   x = 30,216.54