Finding the Fourth Proportional to 3,390.54, 5,085.32 and 1,169.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,390.54 : 5,085.32 = 1,169.72 : x
2. Step 2: Convert to fraction form
   3,390.54/5,085.32 = 1,169.72/x
3. Step 3: Cross multiply
   3,390.54x = 5,085.32 × 1,169.72
4. Step 4: Simplify right side
   3,390.54x = 5,948,400.51
5. Step 5: Solve for x
   x = 5,948,400.51/3,390.54
6. Step 6: Final answer
   x = 1,754.41