Finding the Fourth Proportional to 2,116.89, 2,919.87 and 1,369.71

Step by Step Solution

1. Step 1: Write the proportion equation
   2,116.89 : 2,919.87 = 1,369.71 : x
2. Step 2: Convert to fraction form
   2,116.89/2,919.87 = 1,369.71/x
3. Step 3: Cross multiply
   2,116.89x = 2,919.87 × 1,369.71
4. Step 4: Simplify right side
   2,116.89x = 3,999,375.14
5. Step 5: Solve for x
   x = 3,999,375.14/2,116.89
6. Step 6: Final answer
   x = 1,889.27