Finding the Fourth Proportional to 1,142.87, 1,575.50 and 984.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,142.87 : 1,575.50 = 984.83 : x
2. Step 2: Convert to fraction form
   1,142.87/1,575.50 = 984.83/x
3. Step 3: Cross multiply
   1,142.87x = 1,575.50 × 984.83
4. Step 4: Simplify right side
   1,142.87x = 1,551,586.86
5. Step 5: Solve for x
   x = 1,551,586.86/1,142.87
6. Step 6: Final answer
   x = 1,357.63