Finding the Fourth Proportional to 12,804.57, 17,671.82 and 7,140.24

Step by Step Solution

1. Step 1: Write the proportion equation
   12,804.57 : 17,671.82 = 7,140.24 : x
2. Step 2: Convert to fraction form
   12,804.57/17,671.82 = 7,140.24/x
3. Step 3: Cross multiply
   12,804.57x = 17,671.82 × 7,140.24
4. Step 4: Simplify right side
   12,804.57x = 126,181,000.34
5. Step 5: Solve for x
   x = 126,181,000.34/12,804.57
6. Step 6: Final answer
   x = 9,854.37