Finding the Third Proportional to 9,978.47 and 16,630.17

Step by Step Solution

1. Step 1: Write the proportion equation
   9,978.47 : 16,630.17 = 16,630.17 : x
2. Step 2: Convert to fraction form
   9,978.47/16,630.17 = 16,630.17/x
3. Step 3: Cross multiply
   9,978.47x = 16,630.17 × 16,630.17
4. Step 4: Simplify right side
   9,978.47x = 276,562,616.59
5. Step 5: Solve for x
   x = 276,562,616.59/9,978.47
6. Step 6: Final answer
   x = 27,715.94