Finding the Fourth Proportional to 2,375.72, 3,564.23 and 989.70

Step by Step Solution

1. Step 1: Write the proportion equation
   2,375.72 : 3,564.23 = 989.70 : x
2. Step 2: Convert to fraction form
   2,375.72/3,564.23 = 989.70/x
3. Step 3: Cross multiply
   2,375.72x = 3,564.23 × 989.70
4. Step 4: Simplify right side
   2,375.72x = 3,527,513.48
5. Step 5: Solve for x
   x = 3,527,513.48/2,375.72
6. Step 6: Final answer
   x = 1,484.82