Finding the Fourth Proportional to 2,131.25, 3,201.51 and 1,518.89

Step by Step Solution

1. Step 1: Write the proportion equation
   2,131.25 : 3,201.51 = 1,518.89 : x
2. Step 2: Convert to fraction form
   2,131.25/3,201.51 = 1,518.89/x
3. Step 3: Cross multiply
   2,131.25x = 3,201.51 × 1,518.89
4. Step 4: Simplify right side
   2,131.25x = 4,862,725.52
5. Step 5: Solve for x
   x = 4,862,725.52/2,131.25
6. Step 6: Final answer
   x = 2,281.64