Finding the Fourth Proportional to 1,442.30, 1,990.96 and 976.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,442.30 : 1,990.96 = 976.82 : x
2. Step 2: Convert to fraction form
   1,442.30/1,990.96 = 976.82/x
3. Step 3: Cross multiply
   1,442.30x = 1,990.96 × 976.82
4. Step 4: Simplify right side
   1,442.30x = 1,944,809.55
5. Step 5: Solve for x
   x = 1,944,809.55/1,442.30
6. Step 6: Final answer
   x = 1,348.41