Finding the Fourth Proportional to 5,178.68, 7,146.69 and 2,820.82

Step by Step Solution

1. Step 1: Write the proportion equation
   5,178.68 : 7,146.69 = 2,820.82 : x
2. Step 2: Convert to fraction form
   5,178.68/7,146.69 = 2,820.82/x
3. Step 3: Cross multiply
   5,178.68x = 7,146.69 × 2,820.82
4. Step 4: Simplify right side
   5,178.68x = 20,159,526.09
5. Step 5: Solve for x
   x = 20,159,526.09/5,178.68
6. Step 6: Final answer
   x = 3,892.79