Finding the Fourth Proportional to 12,842.31, 17,722.46 and 7,177.16

Step by Step Solution

1. Step 1: Write the proportion equation
   12,842.31 : 17,722.46 = 7,177.16 : x
2. Step 2: Convert to fraction form
   12,842.31/17,722.46 = 7,177.16/x
3. Step 3: Cross multiply
   12,842.31x = 17,722.46 × 7,177.16
4. Step 4: Simplify right side
   12,842.31x = 127,196,806.52
5. Step 5: Solve for x
   x = 127,196,806.52/12,842.31
6. Step 6: Final answer
   x = 9,904.51