Finding the Fourth Proportional to 1,443.52, 1,990.56 and 976.96

Step by Step Solution

1. Step 1: Write the proportion equation
   1,443.52 : 1,990.56 = 976.96 : x
2. Step 2: Convert to fraction form
   1,443.52/1,990.56 = 976.96/x
3. Step 3: Cross multiply
   1,443.52x = 1,990.56 × 976.96
4. Step 4: Simplify right side
   1,443.52x = 1,944,697.50
5. Step 5: Solve for x
   x = 1,944,697.50/1,443.52
6. Step 6: Final answer
   x = 1,347.19