Finding the Fourth Proportional to 21,076.41, 31,613.86 and 5,281.57

Step by Step Solution

1. Step 1: Write the proportion equation
   21,076.41 : 31,613.86 = 5,281.57 : x
2. Step 2: Convert to fraction form
   21,076.41/31,613.86 = 5,281.57/x
3. Step 3: Cross multiply
   21,076.41x = 31,613.86 × 5,281.57
4. Step 4: Simplify right side
   21,076.41x = 166,970,860.68
5. Step 5: Solve for x
   x = 166,970,860.68/21,076.41
6. Step 6: Final answer
   x = 7,922.17