Finding the Fourth Proportional to 5,518.58, 7,621.05 and 4,003.47

Step by Step Solution

1. Step 1: Write the proportion equation
   5,518.58 : 7,621.05 = 4,003.47 : x
2. Step 2: Convert to fraction form
   5,518.58/7,621.05 = 4,003.47/x
3. Step 3: Cross multiply
   5,518.58x = 7,621.05 × 4,003.47
4. Step 4: Simplify right side
   5,518.58x = 30,510,645.04
5. Step 5: Solve for x
   x = 30,510,645.04/5,518.58
6. Step 6: Final answer
   x = 5,528.72