Finding the Fourth Proportional to 1,890.39, 2,819.94 and 1,613.37

Step by Step Solution

1. Step 1: Write the proportion equation
   1,890.39 : 2,819.94 = 1,613.37 : x
2. Step 2: Convert to fraction form
   1,890.39/2,819.94 = 1,613.37/x
3. Step 3: Cross multiply
   1,890.39x = 2,819.94 × 1,613.37
4. Step 4: Simplify right side
   1,890.39x = 4,549,606.60
5. Step 5: Solve for x
   x = 4,549,606.60/1,890.39
6. Step 6: Final answer
   x = 2,406.70