Finding the Fourth Proportional to 3,618.80, 5,435.48 and 3,516.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,618.80 : 5,435.48 = 3,516.72 : x
2. Step 2: Convert to fraction form
   3,618.80/5,435.48 = 3,516.72/x
3. Step 3: Cross multiply
   3,618.80x = 5,435.48 × 3,516.72
4. Step 4: Simplify right side
   3,618.80x = 19,115,061.23
5. Step 5: Solve for x
   x = 19,115,061.23/3,618.80
6. Step 6: Final answer
   x = 5,282.15