Finding the Fourth Proportional to 20,680.53, 31,021.79 and 5,890.47

Step by Step Solution

1. Step 1: Write the proportion equation
   20,680.53 : 31,021.79 = 5,890.47 : x
2. Step 2: Convert to fraction form
   20,680.53/31,021.79 = 5,890.47/x
3. Step 3: Cross multiply
   20,680.53x = 31,021.79 × 5,890.47
4. Step 4: Simplify right side
   20,680.53x = 182,732,893.89
5. Step 5: Solve for x
   x = 182,732,893.89/20,680.53
6. Step 6: Final answer
   x = 8,835.99