Finding the Fourth Proportional to 21,141.33, 31,702.41 and 7,984.37

Step by Step Solution

1. Step 1: Write the proportion equation
   21,141.33 : 31,702.41 = 7,984.37 : x
2. Step 2: Convert to fraction form
   21,141.33/31,702.41 = 7,984.37/x
3. Step 3: Cross multiply
   21,141.33x = 31,702.41 × 7,984.37
4. Step 4: Simplify right side
   21,141.33x = 253,123,612.82
5. Step 5: Solve for x
   x = 253,123,612.82/21,141.33
6. Step 6: Final answer
   x = 11,972.93