Finding the Fourth Proportional to 2,415.03, 3,622.71 and 771.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,415.03 : 3,622.71 = 771.72 : x
2. Step 2: Convert to fraction form
   2,415.03/3,622.71 = 771.72/x
3. Step 3: Cross multiply
   2,415.03x = 3,622.71 × 771.72
4. Step 4: Simplify right side
   2,415.03x = 2,795,717.76
5. Step 5: Solve for x
   x = 2,795,717.76/2,415.03
6. Step 6: Final answer
   x = 1,157.63