Finding the Fourth Proportional to 2,101.17, 3,148.24 and 989.38

Step by Step Solution

1. Step 1: Write the proportion equation
   2,101.17 : 3,148.24 = 989.38 : x
2. Step 2: Convert to fraction form
   2,101.17/3,148.24 = 989.38/x
3. Step 3: Cross multiply
   2,101.17x = 3,148.24 × 989.38
4. Step 4: Simplify right side
   2,101.17x = 3,114,805.69
5. Step 5: Solve for x
   x = 3,114,805.69/2,101.17
6. Step 6: Final answer
   x = 1,482.41