Finding the Fourth Proportional to 1,907.72, 2,863.12 and 983.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,907.72 : 2,863.12 = 983.72 : x
2. Step 2: Convert to fraction form
   1,907.72/2,863.12 = 983.72/x
3. Step 3: Cross multiply
   1,907.72x = 2,863.12 × 983.72
4. Step 4: Simplify right side
   1,907.72x = 2,816,508.41
5. Step 5: Solve for x
   x = 2,816,508.41/1,907.72
6. Step 6: Final answer
   x = 1,476.37