Finding the Fourth Proportional to 2,375.31, 3,561.05 and 989.69

Step by Step Solution

1. Step 1: Write the proportion equation
   2,375.31 : 3,561.05 = 989.69 : x
2. Step 2: Convert to fraction form
   2,375.31/3,561.05 = 989.69/x
3. Step 3: Cross multiply
   2,375.31x = 3,561.05 × 989.69
4. Step 4: Simplify right side
   2,375.31x = 3,524,343.24
5. Step 5: Solve for x
   x = 3,524,343.24/2,375.31
6. Step 6: Final answer
   x = 1,483.74