Finding the Fourth Proportional to 21,076.59, 31,614.15 and 5,281.76

Step by Step Solution

1. Step 1: Write the proportion equation
   21,076.59 : 31,614.15 = 5,281.76 : x
2. Step 2: Convert to fraction form
   21,076.59/31,614.15 = 5,281.76/x
3. Step 3: Cross multiply
   21,076.59x = 31,614.15 × 5,281.76
4. Step 4: Simplify right side
   21,076.59x = 166,978,431.94
5. Step 5: Solve for x
   x = 166,978,431.94/21,076.59
6. Step 6: Final answer
   x = 7,922.46