Finding the Fourth Proportional to 1,437.72, 1,982.76 and 989.37

Step by Step Solution

1. Step 1: Write the proportion equation
   1,437.72 : 1,982.76 = 989.37 : x
2. Step 2: Convert to fraction form
   1,437.72/1,982.76 = 989.37/x
3. Step 3: Cross multiply
   1,437.72x = 1,982.76 × 989.37
4. Step 4: Simplify right side
   1,437.72x = 1,961,683.26
5. Step 5: Solve for x
   x = 1,961,683.26/1,437.72
6. Step 6: Final answer
   x = 1,364.44