Finding the Third Proportional to 9,872 and 23,120

Step by Step Solution

1. Step 1: Write the proportion equation
   9,872 : 23,120 = 23,120 : x
2. Step 2: Convert to fraction form
   9,872/23,120 = 23,120/x
3. Step 3: Cross multiply
   9,872x = 23,120 × 23,120
4. Step 4: Simplify right side
   9,872x = 534,534,400
5. Step 5: Solve for x
   x = 534,534,400/9,872
6. Step 6: Final answer
   x = 54,146.52