Finding the Fourth Proportional to 2,870.15, 3,960.74 and 1,611.18

Step by Step Solution

1. Step 1: Write the proportion equation
   2,870.15 : 3,960.74 = 1,611.18 : x
2. Step 2: Convert to fraction form
   2,870.15/3,960.74 = 1,611.18/x
3. Step 3: Cross multiply
   2,870.15x = 3,960.74 × 1,611.18
4. Step 4: Simplify right side
   2,870.15x = 6,381,457.02
5. Step 5: Solve for x
   x = 6,381,457.02/2,870.15
6. Step 6: Final answer
   x = 2,223.39