Finding the Third Proportional to 9,870 and 21,560

Step by Step Solution

1. Step 1: Write the proportion equation
   9,870 : 21,560 = 21,560 : x
2. Step 2: Convert to fraction form
   9,870/21,560 = 21,560/x
3. Step 3: Cross multiply
   9,870x = 21,560 × 21,560
4. Step 4: Simplify right side
   9,870x = 464,833,600
5. Step 5: Solve for x
   x = 464,833,600/9,870
6. Step 6: Final answer
   x = 47,095.60