Finding the Fourth Proportional to 12,837.93, 17,715.20 and 7,171.91

Step by Step Solution

1. Step 1: Write the proportion equation
   12,837.93 : 17,715.20 = 7,171.91 : x
2. Step 2: Convert to fraction form
   12,837.93/17,715.20 = 7,171.91/x
3. Step 3: Cross multiply
   12,837.93x = 17,715.20 × 7,171.91
4. Step 4: Simplify right side
   12,837.93x = 127,051,820.03
5. Step 5: Solve for x
   x = 127,051,820.03/12,837.93
6. Step 6: Final answer
   x = 9,896.60