Finding the Fourth Proportional to 7,142.58, 10,715.57 and 2,980.27

Step by Step Solution

1. Step 1: Write the proportion equation
   7,142.58 : 10,715.57 = 2,980.27 : x
2. Step 2: Convert to fraction form
   7,142.58/10,715.57 = 2,980.27/x
3. Step 3: Cross multiply
   7,142.58x = 10,715.57 × 2,980.27
4. Step 4: Simplify right side
   7,142.58x = 31,935,301.47
5. Step 5: Solve for x
   x = 31,935,301.47/7,142.58
6. Step 6: Final answer
   x = 4,471.12