Finding the Fourth Proportional to 12,842.31, 17,722.49 and 7,253.31

Step by Step Solution

1. Step 1: Write the proportion equation
   12,842.31 : 17,722.49 = 7,253.31 : x
2. Step 2: Convert to fraction form
   12,842.31/17,722.49 = 7,253.31/x
3. Step 3: Cross multiply
   12,842.31x = 17,722.49 × 7,253.31
4. Step 4: Simplify right side
   12,842.31x = 128,546,713.94
5. Step 5: Solve for x
   x = 128,546,713.94/12,842.31
6. Step 6: Final answer
   x = 10,009.63