Finding the Fourth Proportional to 11,939.72, 17,871.42 and 7,983.32

Step by Step Solution

1. Step 1: Write the proportion equation
   11,939.72 : 17,871.42 = 7,983.32 : x
2. Step 2: Convert to fraction form
   11,939.72/17,871.42 = 7,983.32/x
3. Step 3: Cross multiply
   11,939.72x = 17,871.42 × 7,983.32
4. Step 4: Simplify right side
   11,939.72x = 142,673,264.71
5. Step 5: Solve for x
   x = 142,673,264.71/11,939.72
6. Step 6: Final answer
   x = 11,949.46