Finding the Fourth Proportional to 5,598.72, 8,399.52 and 2,520

Step by Step Solution

1. Step 1: Write the proportion equation
   5,598.72 : 8,399.52 = 2,520 : x
2. Step 2: Convert to fraction form
   5,598.72/8,399.52 = 2,520/x
3. Step 3: Cross multiply
   5,598.72x = 8,399.52 × 2,520
4. Step 4: Simplify right side
   5,598.72x = 21,166,790.40
5. Step 5: Solve for x
   x = 21,166,790.40/5,598.72
6. Step 6: Final answer
   x = 3,780.65