Finding the Fourth Proportional to 2,931.50, 4,395.72 and 983

Step by Step Solution

1. Step 1: Write the proportion equation
   2,931.50 : 4,395.72 = 983 : x
2. Step 2: Convert to fraction form
   2,931.50/4,395.72 = 983/x
3. Step 3: Cross multiply
   2,931.50x = 4,395.72 × 983
4. Step 4: Simplify right side
   2,931.50x = 4,320,992.76
5. Step 5: Solve for x
   x = 4,320,992.76/2,931.50
6. Step 6: Final answer
   x = 1,473.99