Finding the Fourth Proportional to 3,635.89, 5,415.10 and 3,506.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,635.89 : 5,415.10 = 3,506.72 : x
2. Step 2: Convert to fraction form
   3,635.89/5,415.10 = 3,506.72/x
3. Step 3: Cross multiply
   3,635.89x = 5,415.10 × 3,506.72
4. Step 4: Simplify right side
   3,635.89x = 18,989,238.58
5. Step 5: Solve for x
   x = 18,989,238.58/3,635.89
6. Step 6: Final answer
   x = 5,222.72