Finding the Fourth Proportional to 12,804.27, 17,670.04 and 7,139.51

Step by Step Solution

1. Step 1: Write the proportion equation
   12,804.27 : 17,670.04 = 7,139.51 : x
2. Step 2: Convert to fraction form
   12,804.27/17,670.04 = 7,139.51/x
3. Step 3: Cross multiply
   12,804.27x = 17,670.04 × 7,139.51
4. Step 4: Simplify right side
   12,804.27x = 126,155,387.34
5. Step 5: Solve for x
   x = 126,155,387.34/12,804.27
6. Step 6: Final answer
   x = 9,852.61