Finding the Third Proportional to 18,124.50 and 31,920

Step by Step Solution

1. Step 1: Write the proportion equation
   18,124.50 : 31,920 = 31,920 : x
2. Step 2: Convert to fraction form
   18,124.50/31,920 = 31,920/x
3. Step 3: Cross multiply
   18,124.50x = 31,920 × 31,920
4. Step 4: Simplify right side
   18,124.50x = 1,018,886,400
5. Step 5: Solve for x
   x = 1,018,886,400/18,124.50
6. Step 6: Final answer
   x = 56,215.97