Finding the Fourth Proportional to 5,178.42, 7,146.24 and 2,820.54

Step by Step Solution

1. Step 1: Write the proportion equation
   5,178.42 : 7,146.24 = 2,820.54 : x
2. Step 2: Convert to fraction form
   5,178.42/7,146.24 = 2,820.54/x
3. Step 3: Cross multiply
   5,178.42x = 7,146.24 × 2,820.54
4. Step 4: Simplify right side
   5,178.42x = 20,156,255.77
5. Step 5: Solve for x
   x = 20,156,255.77/5,178.42
6. Step 6: Final answer
   x = 3,892.36