Finding the Fourth Proportional to 12,837.03, 17,715.79 and 7,171.89

Step by Step Solution

1. Step 1: Write the proportion equation
   12,837.03 : 17,715.79 = 7,171.89 : x
2. Step 2: Convert to fraction form
   12,837.03/17,715.79 = 7,171.89/x
3. Step 3: Cross multiply
   12,837.03x = 17,715.79 × 7,171.89
4. Step 4: Simplify right side
   12,837.03x = 127,055,719.15
5. Step 5: Solve for x
   x = 127,055,719.15/12,837.03
6. Step 6: Final answer
   x = 9,897.59