Finding the Fourth Proportional to 3,390.19, 5,085.37 and 1,081.69

Step by Step Solution

1. Step 1: Write the proportion equation
   3,390.19 : 5,085.37 = 1,081.69 : x
2. Step 2: Convert to fraction form
   3,390.19/5,085.37 = 1,081.69/x
3. Step 3: Cross multiply
   3,390.19x = 5,085.37 × 1,081.69
4. Step 4: Simplify right side
   3,390.19x = 5,500,782.51
5. Step 5: Solve for x
   x = 5,500,782.51/3,390.19
6. Step 6: Final answer
   x = 1,622.56