Finding the Third Proportional to 17,556 and 31,218

Step by Step Solution

1. Step 1: Write the proportion equation
   17,556 : 31,218 = 31,218 : x
2. Step 2: Convert to fraction form
   17,556/31,218 = 31,218/x
3. Step 3: Cross multiply
   17,556x = 31,218 × 31,218
4. Step 4: Simplify right side
   17,556x = 974,563,524
5. Step 5: Solve for x
   x = 974,563,524/17,556
6. Step 6: Final answer
   x = 55,511.71