Finding the Fourth Proportional to 3,605.57, 5,409.72 and 1,415.82

Step by Step Solution

1. Step 1: Write the proportion equation
   3,605.57 : 5,409.72 = 1,415.82 : x
2. Step 2: Convert to fraction form
   3,605.57/5,409.72 = 1,415.82/x
3. Step 3: Cross multiply
   3,605.57x = 5,409.72 × 1,415.82
4. Step 4: Simplify right side
   3,605.57x = 7,659,189.77
5. Step 5: Solve for x
   x = 7,659,189.77/3,605.57
6. Step 6: Final answer
   x = 2,124.27