Finding the Third Proportional to 9,888 and 21,060

Step by Step Solution

1. Step 1: Write the proportion equation
   9,888 : 21,060 = 21,060 : x
2. Step 2: Convert to fraction form
   9,888/21,060 = 21,060/x
3. Step 3: Cross multiply
   9,888x = 21,060 × 21,060
4. Step 4: Simplify right side
   9,888x = 443,523,600
5. Step 5: Solve for x
   x = 443,523,600/9,888
6. Step 6: Final answer
   x = 44,854.73