Finding the Fourth Proportional to 31,511.06, 43,472.79 and 21,948.41

Step by Step Solution

1. Step 1: Write the proportion equation
   31,511.06 : 43,472.79 = 21,948.41 : x
2. Step 2: Convert to fraction form
   31,511.06/43,472.79 = 21,948.41/x
3. Step 3: Cross multiply
   31,511.06x = 43,472.79 × 21,948.41
4. Step 4: Simplify right side
   31,511.06x = 954,158,401.40
5. Step 5: Solve for x
   x = 954,158,401.40/31,511.06
6. Step 6: Final answer
   x = 30,280.12