Finding the Fourth Proportional to 12,826.47, 17,701.05 and 7,161.51

Step by Step Solution

1. Step 1: Write the proportion equation
   12,826.47 : 17,701.05 = 7,161.51 : x
2. Step 2: Convert to fraction form
   12,826.47/17,701.05 = 7,161.51/x
3. Step 3: Cross multiply
   12,826.47x = 17,701.05 × 7,161.51
4. Step 4: Simplify right side
   12,826.47x = 126,766,246.59
5. Step 5: Solve for x
   x = 126,766,246.59/12,826.47
6. Step 6: Final answer
   x = 9,883.17