Finding the Fourth Proportional to 2,290.82, 3,158.42 and 1,870.74

Step by Step Solution

1. Step 1: Write the proportion equation
   2,290.82 : 3,158.42 = 1,870.74 : x
2. Step 2: Convert to fraction form
   2,290.82/3,158.42 = 1,870.74/x
3. Step 3: Cross multiply
   2,290.82x = 3,158.42 × 1,870.74
4. Step 4: Simplify right side
   2,290.82x = 5,908,573.28
5. Step 5: Solve for x
   x = 5,908,573.28/2,290.82
6. Step 6: Final answer
   x = 2,579.25