Finding the Fourth Proportional to 3,657.16, 5,485.42 and 1,059.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,657.16 : 5,485.42 = 1,059.72 : x
2. Step 2: Convert to fraction form
   3,657.16/5,485.42 = 1,059.72/x
3. Step 3: Cross multiply
   3,657.16x = 5,485.42 × 1,059.72
4. Step 4: Simplify right side
   3,657.16x = 5,813,009.28
5. Step 5: Solve for x
   x = 5,813,009.28/3,657.16
6. Step 6: Final answer
   x = 1,589.49