Finding the Fourth Proportional to 1,811.50, 2,499.90 and 983.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,811.50 : 2,499.90 = 983.50 : x
2. Step 2: Convert to fraction form
   1,811.50/2,499.90 = 983.50/x
3. Step 3: Cross multiply
   1,811.50x = 2,499.90 × 983.50
4. Step 4: Simplify right side
   1,811.50x = 2,458,651.65
5. Step 5: Solve for x
   x = 2,458,651.65/1,811.50
6. Step 6: Final answer
   x = 1,357.25