Finding the Fourth Proportional to 3,390.39, 5,085.18 and 1,443.15

Step by Step Solution

1. Step 1: Write the proportion equation
   3,390.39 : 5,085.18 = 1,443.15 : x
2. Step 2: Convert to fraction form
   3,390.39/5,085.18 = 1,443.15/x
3. Step 3: Cross multiply
   3,390.39x = 5,085.18 × 1,443.15
4. Step 4: Simplify right side
   3,390.39x = 7,338,677.52
5. Step 5: Solve for x
   x = 7,338,677.52/3,390.39
6. Step 6: Final answer
   x = 2,164.55