Finding the Fourth Proportional to 6,602.65, 9,111.69 and 3,949.39

Step by Step Solution

1. Step 1: Write the proportion equation
   6,602.65 : 9,111.69 = 3,949.39 : x
2. Step 2: Convert to fraction form
   6,602.65/9,111.69 = 3,949.39/x
3. Step 3: Cross multiply
   6,602.65x = 9,111.69 × 3,949.39
4. Step 4: Simplify right side
   6,602.65x = 35,985,628.76
5. Step 5: Solve for x
   x = 35,985,628.76/6,602.65
6. Step 6: Final answer
   x = 5,450.18