Finding the Fourth Proportional to 4,003.80, 5,528.33 and 3,118.07

Step by Step Solution

1. Step 1: Write the proportion equation
   4,003.80 : 5,528.33 = 3,118.07 : x
2. Step 2: Convert to fraction form
   4,003.80/5,528.33 = 3,118.07/x
3. Step 3: Cross multiply
   4,003.80x = 5,528.33 × 3,118.07
4. Step 4: Simplify right side
   4,003.80x = 17,237,705.53
5. Step 5: Solve for x
   x = 17,237,705.53/4,003.80
6. Step 6: Final answer
   x = 4,305.33