Finding the Fourth Proportional to 2,010.81, 3,015.54 and 899.53

Step by Step Solution

1. Step 1: Write the proportion equation
   2,010.81 : 3,015.54 = 899.53 : x
2. Step 2: Convert to fraction form
   2,010.81/3,015.54 = 899.53/x
3. Step 3: Cross multiply
   2,010.81x = 3,015.54 × 899.53
4. Step 4: Simplify right side
   2,010.81x = 2,712,568.70
5. Step 5: Solve for x
   x = 2,712,568.70/2,010.81
6. Step 6: Final answer
   x = 1,348.99