Finding the Fourth Proportional to 7,339.55, 10,128.49 and 4,152.80

Step by Step Solution

1. Step 1: Write the proportion equation
   7,339.55 : 10,128.49 = 4,152.80 : x
2. Step 2: Convert to fraction form
   7,339.55/10,128.49 = 4,152.80/x
3. Step 3: Cross multiply
   7,339.55x = 10,128.49 × 4,152.80
4. Step 4: Simplify right side
   7,339.55x = 42,061,608.21
5. Step 5: Solve for x
   x = 42,061,608.21/7,339.55
6. Step 6: Final answer
   x = 5,730.82