Finding the Fourth Proportional to 6,443.89, 8,892.59 and 3,611.39

Step by Step Solution

1. Step 1: Write the proportion equation
   6,443.89 : 8,892.59 = 3,611.39 : x
2. Step 2: Convert to fraction form
   6,443.89/8,892.59 = 3,611.39/x
3. Step 3: Cross multiply
   6,443.89x = 8,892.59 × 3,611.39
4. Step 4: Simplify right side
   6,443.89x = 32,114,548.08
5. Step 5: Solve for x
   x = 32,114,548.08/6,443.89
6. Step 6: Final answer
   x = 4,983.72