Finding the Fourth Proportional to 6,611.82, 9,909.01 and 3,101.28

Step by Step Solution

1. Step 1: Write the proportion equation
   6,611.82 : 9,909.01 = 3,101.28 : x
2. Step 2: Convert to fraction form
   6,611.82/9,909.01 = 3,101.28/x
3. Step 3: Cross multiply
   6,611.82x = 9,909.01 × 3,101.28
4. Step 4: Simplify right side
   6,611.82x = 30,730,614.53
5. Step 5: Solve for x
   x = 30,730,614.53/6,611.82
6. Step 6: Final answer
   x = 4,647.83