Finding the Fourth Proportional to 2,116.18, 2,919.35 and 1,370.39

Step by Step Solution

1. Step 1: Write the proportion equation
   2,116.18 : 2,919.35 = 1,370.39 : x
2. Step 2: Convert to fraction form
   2,116.18/2,919.35 = 1,370.39/x
3. Step 3: Cross multiply
   2,116.18x = 2,919.35 × 1,370.39
4. Step 4: Simplify right side
   2,116.18x = 4,000,636.88
5. Step 5: Solve for x
   x = 4,000,636.88/2,116.18
6. Step 6: Final answer
   x = 1,890.50