Finding the Fourth Proportional to 10,658.79, 15,988.59 and 2,868.21

Step by Step Solution

1. Step 1: Write the proportion equation
   10,658.79 : 15,988.59 = 2,868.21 : x
2. Step 2: Convert to fraction form
   10,658.79/15,988.59 = 2,868.21/x
3. Step 3: Cross multiply
   10,658.79x = 15,988.59 × 2,868.21
4. Step 4: Simplify right side
   10,658.79x = 45,858,633.72
5. Step 5: Solve for x
   x = 45,858,633.72/10,658.79
6. Step 6: Final answer
   x = 4,302.42