Finding the Fourth Proportional to 6,669.83, 10,005.25 and 1,989.47

Step by Step Solution

1. Step 1: Write the proportion equation
   6,669.83 : 10,005.25 = 1,989.47 : x
2. Step 2: Convert to fraction form
   6,669.83/10,005.25 = 1,989.47/x
3. Step 3: Cross multiply
   6,669.83x = 10,005.25 × 1,989.47
4. Step 4: Simplify right side
   6,669.83x = 19,905,144.72
5. Step 5: Solve for x
   x = 19,905,144.72/6,669.83
6. Step 6: Final answer
   x = 2,984.36