Finding the Fourth Proportional to 12,842.42, 17,721.15 and 7,176.02

Step by Step Solution

1. Step 1: Write the proportion equation
   12,842.42 : 17,721.15 = 7,176.02 : x
2. Step 2: Convert to fraction form
   12,842.42/17,721.15 = 7,176.02/x
3. Step 3: Cross multiply
   12,842.42x = 17,721.15 × 7,176.02
4. Step 4: Simplify right side
   12,842.42x = 127,167,326.82
5. Step 5: Solve for x
   x = 127,167,326.82/12,842.42
6. Step 6: Final answer
   x = 9,902.13