Finding the Fourth Proportional to 2,010.63, 3,015.54 and 1,399.89

Step by Step Solution

1. Step 1: Write the proportion equation
   2,010.63 : 3,015.54 = 1,399.89 : x
2. Step 2: Convert to fraction form
   2,010.63/3,015.54 = 1,399.89/x
3. Step 3: Cross multiply
   2,010.63x = 3,015.54 × 1,399.89
4. Step 4: Simplify right side
   2,010.63x = 4,221,424.29
5. Step 5: Solve for x
   x = 4,221,424.29/2,010.63
6. Step 6: Final answer
   x = 2,099.55