Finding the Fourth Proportional to 2,816.09, 3,886.31 and 1,870.25

Step by Step Solution

1. Step 1: Write the proportion equation
   2,816.09 : 3,886.31 = 1,870.25 : x
2. Step 2: Convert to fraction form
   2,816.09/3,886.31 = 1,870.25/x
3. Step 3: Cross multiply
   2,816.09x = 3,886.31 × 1,870.25
4. Step 4: Simplify right side
   2,816.09x = 7,268,361.56
5. Step 5: Solve for x
   x = 7,268,361.56/2,816.09
6. Step 6: Final answer
   x = 2,581.01