Finding the Fourth Proportional to 2,290.94, 3,158.54 and 1,870.88

Step by Step Solution

1. Step 1: Write the proportion equation
   2,290.94 : 3,158.54 = 1,870.88 : x
2. Step 2: Convert to fraction form
   2,290.94/3,158.54 = 1,870.88/x
3. Step 3: Cross multiply
   2,290.94x = 3,158.54 × 1,870.88
4. Step 4: Simplify right side
   2,290.94x = 5,909,249.32
5. Step 5: Solve for x
   x = 5,909,249.32/2,290.94
6. Step 6: Final answer
   x = 2,579.40