Finding the Third Proportional to 17,911 and 36,172

Step by Step Solution

1. Step 1: Write the proportion equation
   17,911 : 36,172 = 36,172 : x
2. Step 2: Convert to fraction form
   17,911/36,172 = 36,172/x
3. Step 3: Cross multiply
   17,911x = 36,172 × 36,172
4. Step 4: Simplify right side
   17,911x = 1,308,413,584
5. Step 5: Solve for x
   x = 1,308,413,584/17,911
6. Step 6: Final answer
   x = 73,050.84