Finding the Fourth Proportional to 31,822.88, 43,916.82 and 21,772.40

Step by Step Solution

1. Step 1: Write the proportion equation
   31,822.88 : 43,916.82 = 21,772.40 : x
2. Step 2: Convert to fraction form
   31,822.88/43,916.82 = 21,772.40/x
3. Step 3: Cross multiply
   31,822.88x = 43,916.82 × 21,772.40
4. Step 4: Simplify right side
   31,822.88x = 956,174,571.77
5. Step 5: Solve for x
   x = 956,174,571.77/31,822.88
6. Step 6: Final answer
   x = 30,046.76