Finding the Fourth Proportional to 3,518.52, 5,275.15 and 2,131.53

Step by Step Solution

1. Step 1: Write the proportion equation
   3,518.52 : 5,275.15 = 2,131.53 : x
2. Step 2: Convert to fraction form
   3,518.52/5,275.15 = 2,131.53/x
3. Step 3: Cross multiply
   3,518.52x = 5,275.15 × 2,131.53
4. Step 4: Simplify right side
   3,518.52x = 11,244,140.48
5. Step 5: Solve for x
   x = 11,244,140.48/3,518.52
6. Step 6: Final answer
   x = 3,195.70