Finding the Fourth Proportional to 7,290.31, 10,059.72 and 4,103.21

Step by Step Solution

1. Step 1: Write the proportion equation
   7,290.31 : 10,059.72 = 4,103.21 : x
2. Step 2: Convert to fraction form
   7,290.31/10,059.72 = 4,103.21/x
3. Step 3: Cross multiply
   7,290.31x = 10,059.72 × 4,103.21
4. Step 4: Simplify right side
   7,290.31x = 41,277,143.70
5. Step 5: Solve for x
   x = 41,277,143.70/7,290.31
6. Step 6: Final answer
   x = 5,661.92