Finding the Fourth Proportional to 1,976.25, 2,962.83 and 989.45

Step by Step Solution

1. Step 1: Write the proportion equation
   1,976.25 : 2,962.83 = 989.45 : x
2. Step 2: Convert to fraction form
   1,976.25/2,962.83 = 989.45/x
3. Step 3: Cross multiply
   1,976.25x = 2,962.83 × 989.45
4. Step 4: Simplify right side
   1,976.25x = 2,931,579.55
5. Step 5: Solve for x
   x = 2,931,579.55/1,976.25
6. Step 6: Final answer
   x = 1,483.41