Finding the Fourth Proportional to 5,142.69, 7,709.18 and 2,223.05

Step by Step Solution

1. Step 1: Write the proportion equation
   5,142.69 : 7,709.18 = 2,223.05 : x
2. Step 2: Convert to fraction form
   5,142.69/7,709.18 = 2,223.05/x
3. Step 3: Cross multiply
   5,142.69x = 7,709.18 × 2,223.05
4. Step 4: Simplify right side
   5,142.69x = 17,137,842.94
5. Step 5: Solve for x
   x = 17,137,842.94/5,142.69
6. Step 6: Final answer
   x = 3,332.47