Finding the Fourth Proportional to 6,669.46, 10,004.69 and 1,989.10

Step by Step Solution

1. Step 1: Write the proportion equation
   6,669.46 : 10,004.69 = 1,989.10 : x
2. Step 2: Convert to fraction form
   6,669.46/10,004.69 = 1,989.10/x
3. Step 3: Cross multiply
   6,669.46x = 10,004.69 × 1,989.10
4. Step 4: Simplify right side
   6,669.46x = 19,900,333.85
5. Step 5: Solve for x
   x = 19,900,333.85/6,669.46
6. Step 6: Final answer
   x = 2,983.80