Finding the Fourth Proportional to 5,621.02, 8,423.83 and 2,156.38

Step by Step Solution

1. Step 1: Write the proportion equation
   5,621.02 : 8,423.83 = 2,156.38 : x
2. Step 2: Convert to fraction form
   5,621.02/8,423.83 = 2,156.38/x
3. Step 3: Cross multiply
   5,621.02x = 8,423.83 × 2,156.38
4. Step 4: Simplify right side
   5,621.02x = 18,164,978.54
5. Step 5: Solve for x
   x = 18,164,978.54/5,621.02
6. Step 6: Final answer
   x = 3,231.62