Finding the Fourth Proportional to 3,391.97, 5,088.12 and 1,053.57

Step by Step Solution

1. Step 1: Write the proportion equation
   3,391.97 : 5,088.12 = 1,053.57 : x
2. Step 2: Convert to fraction form
   3,391.97/5,088.12 = 1,053.57/x
3. Step 3: Cross multiply
   3,391.97x = 5,088.12 × 1,053.57
4. Step 4: Simplify right side
   3,391.97x = 5,360,665.15
5. Step 5: Solve for x
   x = 5,360,665.15/3,391.97
6. Step 6: Final answer
   x = 1,580.40