Finding the Fourth Proportional to 2,870.39, 3,961.31 and 1,611.74

Step by Step Solution

1. Step 1: Write the proportion equation
   2,870.39 : 3,961.31 = 1,611.74 : x
2. Step 2: Convert to fraction form
   2,870.39/3,961.31 = 1,611.74/x
3. Step 3: Cross multiply
   2,870.39x = 3,961.31 × 1,611.74
4. Step 4: Simplify right side
   2,870.39x = 6,384,573.91
5. Step 5: Solve for x
   x = 6,384,573.91/2,870.39
6. Step 6: Final answer
   x = 2,224.29