Finding the Fourth Proportional to 3,480.59, 5,221.56 and 1,015.43

Step by Step Solution

1. Step 1: Write the proportion equation
   3,480.59 : 5,221.56 = 1,015.43 : x
2. Step 2: Convert to fraction form
   3,480.59/5,221.56 = 1,015.43/x
3. Step 3: Cross multiply
   3,480.59x = 5,221.56 × 1,015.43
4. Step 4: Simplify right side
   3,480.59x = 5,302,106.37
5. Step 5: Solve for x
   x = 5,302,106.37/3,480.59
6. Step 6: Final answer
   x = 1,523.33