Finding the Fourth Proportional to 6,602.61, 9,111.60 and 3,618.56

Step by Step Solution

1. Step 1: Write the proportion equation
   6,602.61 : 9,111.60 = 3,618.56 : x
2. Step 2: Convert to fraction form
   6,602.61/9,111.60 = 3,618.56/x
3. Step 3: Cross multiply
   6,602.61x = 9,111.60 × 3,618.56
4. Step 4: Simplify right side
   6,602.61x = 32,970,871.30
5. Step 5: Solve for x
   x = 32,970,871.30/6,602.61
6. Step 6: Final answer
   x = 4,993.61