Finding the Fourth Proportional to 3,483.72, 4,807.71 and 2,158.20

Step by Step Solution

1. Step 1: Write the proportion equation
   3,483.72 : 4,807.71 = 2,158.20 : x
2. Step 2: Convert to fraction form
   3,483.72/4,807.71 = 2,158.20/x
3. Step 3: Cross multiply
   3,483.72x = 4,807.71 × 2,158.20
4. Step 4: Simplify right side
   3,483.72x = 10,375,999.72
5. Step 5: Solve for x
   x = 10,375,999.72/3,483.72
6. Step 6: Final answer
   x = 2,978.43