Finding the Fourth Proportional to 5,803.47, 7,984.98 and 5,640.12

Step by Step Solution

1. Step 1: Write the proportion equation
   5,803.47 : 7,984.98 = 5,640.12 : x
2. Step 2: Convert to fraction form
   5,803.47/7,984.98 = 5,640.12/x
3. Step 3: Cross multiply
   5,803.47x = 7,984.98 × 5,640.12
4. Step 4: Simplify right side
   5,803.47x = 45,036,245.40
5. Step 5: Solve for x
   x = 45,036,245.40/5,803.47
6. Step 6: Final answer
   x = 7,760.23