Finding the Third Proportional to 8,178.47 and 17,139.09

Step by Step Solution

1. Step 1: Write the proportion equation
   8,178.47 : 17,139.09 = 17,139.09 : x
2. Step 2: Convert to fraction form
   8,178.47/17,139.09 = 17,139.09/x
3. Step 3: Cross multiply
   8,178.47x = 17,139.09 × 17,139.09
4. Step 4: Simplify right side
   8,178.47x = 293,748,534.57
5. Step 5: Solve for x
   x = 293,748,534.57/8,178.47
6. Step 6: Final answer
   x = 35,917.30