Finding the Fourth Proportional to 12,854.20, 17,738.06 and 7,111.32

Step by Step Solution

1. Step 1: Write the proportion equation
   12,854.20 : 17,738.06 = 7,111.32 : x
2. Step 2: Convert to fraction form
   12,854.20/17,738.06 = 7,111.32/x
3. Step 3: Cross multiply
   12,854.20x = 17,738.06 × 7,111.32
4. Step 4: Simplify right side
   12,854.20x = 126,140,918.76
5. Step 5: Solve for x
   x = 126,140,918.76/12,854.20
6. Step 6: Final answer
   x = 9,813.21