Finding the Fourth Proportional to 3,670.65, 5,511.42 and 3,561.30

Step by Step Solution

1. Step 1: Write the proportion equation
   3,670.65 : 5,511.42 = 3,561.30 : x
2. Step 2: Convert to fraction form
   3,670.65/5,511.42 = 3,561.30/x
3. Step 3: Cross multiply
   3,670.65x = 5,511.42 × 3,561.30
4. Step 4: Simplify right side
   3,670.65x = 19,627,820.05
5. Step 5: Solve for x
   x = 19,627,820.05/3,670.65
6. Step 6: Final answer
   x = 5,347.23