Finding the Fourth Proportional to 21,123.42, 31,686.84 and 5,541

Step by Step Solution

1. Step 1: Write the proportion equation
   21,123.42 : 31,686.84 = 5,541 : x
2. Step 2: Convert to fraction form
   21,123.42/31,686.84 = 5,541/x
3. Step 3: Cross multiply
   21,123.42x = 31,686.84 × 5,541
4. Step 4: Simplify right side
   21,123.42x = 175,576,780.44
5. Step 5: Solve for x
   x = 175,576,780.44/21,123.42
6. Step 6: Final answer
   x = 8,311.95