Finding the Fourth Proportional to 5,142.79, 7,098.38 and 3,018.79

Step by Step Solution

1. Step 1: Write the proportion equation
   5,142.79 : 7,098.38 = 3,018.79 : x
2. Step 2: Convert to fraction form
   5,142.79/7,098.38 = 3,018.79/x
3. Step 3: Cross multiply
   5,142.79x = 7,098.38 × 3,018.79
4. Step 4: Simplify right side
   5,142.79x = 21,428,518.56
5. Step 5: Solve for x
   x = 21,428,518.56/5,142.79
6. Step 6: Final answer
   x = 4,166.71