Finding the Fourth Proportional to 1,513.44, 2,087.91 and 1,009.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,513.44 : 2,087.91 = 1,009.89 : x
2. Step 2: Convert to fraction form
   1,513.44/2,087.91 = 1,009.89/x
3. Step 3: Cross multiply
   1,513.44x = 2,087.91 × 1,009.89
4. Step 4: Simplify right side
   1,513.44x = 2,108,559.43
5. Step 5: Solve for x
   x = 2,108,559.43/1,513.44
6. Step 6: Final answer
   x = 1,393.22