Finding the Fourth Proportional to 3,391.72, 5,087.75 and 1,053.32

Step by Step Solution

1. Step 1: Write the proportion equation
   3,391.72 : 5,087.75 = 1,053.32 : x
2. Step 2: Convert to fraction form
   3,391.72/5,087.75 = 1,053.32/x
3. Step 3: Cross multiply
   3,391.72x = 5,087.75 × 1,053.32
4. Step 4: Simplify right side
   3,391.72x = 5,358,998.12
5. Step 5: Solve for x
   x = 5,358,998.12/3,391.72
6. Step 6: Final answer
   x = 1,580.02