Finding the Fourth Proportional to 21,300.05, 31,951.82 and 8,817.75

Step by Step Solution

1. Step 1: Write the proportion equation
   21,300.05 : 31,951.82 = 8,817.75 : x
2. Step 2: Convert to fraction form
   21,300.05/31,951.82 = 8,817.75/x
3. Step 3: Cross multiply
   21,300.05x = 31,951.82 × 8,817.75
4. Step 4: Simplify right side
   21,300.05x = 281,743,160.81
5. Step 5: Solve for x
   x = 281,743,160.81/21,300.05
6. Step 6: Final answer
   x = 13,227.35