Finding the Third Proportional to 9,810 and 12,159

Step by Step Solution

1. Step 1: Write the proportion equation
   9,810 : 12,159 = 12,159 : x
2. Step 2: Convert to fraction form
   9,810/12,159 = 12,159/x
3. Step 3: Cross multiply
   9,810x = 12,159 × 12,159
4. Step 4: Simplify right side
   9,810x = 147,841,281
5. Step 5: Solve for x
   x = 147,841,281/9,810
6. Step 6: Final answer
   x = 15,070.47