Finding the Fourth Proportional to 2,415.59, 3,622.37 and 771.69

Step by Step Solution

1. Step 1: Write the proportion equation
   2,415.59 : 3,622.37 = 771.69 : x
2. Step 2: Convert to fraction form
   2,415.59/3,622.37 = 771.69/x
3. Step 3: Cross multiply
   2,415.59x = 3,622.37 × 771.69
4. Step 4: Simplify right side
   2,415.59x = 2,795,353.83
5. Step 5: Solve for x
   x = 2,795,353.83/2,415.59
6. Step 6: Final answer
   x = 1,157.21