Finding the Fourth Proportional to 12,841.74, 17,721 and 7,176.15

Step by Step Solution

1. Step 1: Write the proportion equation
   12,841.74 : 17,721 = 7,176.15 : x
2. Step 2: Convert to fraction form
   12,841.74/17,721 = 7,176.15/x
3. Step 3: Cross multiply
   12,841.74x = 17,721 × 7,176.15
4. Step 4: Simplify right side
   12,841.74x = 127,168,554.15
5. Step 5: Solve for x
   x = 127,168,554.15/12,841.74
6. Step 6: Final answer
   x = 9,902.75