Finding the Fourth Proportional to 12,836.45, 17,713.33 and 7,170.91

Step by Step Solution

1. Step 1: Write the proportion equation
   12,836.45 : 17,713.33 = 7,170.91 : x
2. Step 2: Convert to fraction form
   12,836.45/17,713.33 = 7,170.91/x
3. Step 3: Cross multiply
   12,836.45x = 17,713.33 × 7,170.91
4. Step 4: Simplify right side
   12,836.45x = 127,020,633.02
5. Step 5: Solve for x
   x = 127,020,633.02/12,836.45
6. Step 6: Final answer
   x = 9,895.31