Finding the Fourth Proportional to 7,340.24, 10,128.08 and 4,196.40

Step by Step Solution

1. Step 1: Write the proportion equation
   7,340.24 : 10,128.08 = 4,196.40 : x
2. Step 2: Convert to fraction form
   7,340.24/10,128.08 = 4,196.40/x
3. Step 3: Cross multiply
   7,340.24x = 10,128.08 × 4,196.40
4. Step 4: Simplify right side
   7,340.24x = 42,501,474.91
5. Step 5: Solve for x
   x = 42,501,474.91/7,340.24
6. Step 6: Final answer
   x = 5,790.20