Finding the Fourth Proportional to 2,213.73, 3,321.20 and 1,513.89

Step by Step Solution

1. Step 1: Write the proportion equation
   2,213.73 : 3,321.20 = 1,513.89 : x
2. Step 2: Convert to fraction form
   2,213.73/3,321.20 = 1,513.89/x
3. Step 3: Cross multiply
   2,213.73x = 3,321.20 × 1,513.89
4. Step 4: Simplify right side
   2,213.73x = 5,027,935.25
5. Step 5: Solve for x
   x = 5,027,935.25/2,213.73
6. Step 6: Final answer
   x = 2,271.25