Finding the Fourth Proportional to 7,154.43, 9,868.59 and 5,167.91

Step by Step Solution

1. Step 1: Write the proportion equation
   7,154.43 : 9,868.59 = 5,167.91 : x
2. Step 2: Convert to fraction form
   7,154.43/9,868.59 = 5,167.91/x
3. Step 3: Cross multiply
   7,154.43x = 9,868.59 × 5,167.91
4. Step 4: Simplify right side
   7,154.43x = 50,999,935.60
5. Step 5: Solve for x
   x = 50,999,935.60/7,154.43
6. Step 6: Final answer
   x = 7,128.44