Finding the Third Proportional to 10,985 and 25,920

Step by Step Solution

1. Step 1: Write the proportion equation
   10,985 : 25,920 = 25,920 : x
2. Step 2: Convert to fraction form
   10,985/25,920 = 25,920/x
3. Step 3: Cross multiply
   10,985x = 25,920 × 25,920
4. Step 4: Simplify right side
   10,985x = 671,846,400
5. Step 5: Solve for x
   x = 671,846,400/10,985
6. Step 6: Final answer
   x = 61,160.35