Finding the Fourth Proportional to 1,433.30, 1,978.36 and 873.99

Step by Step Solution

1. Step 1: Write the proportion equation
   1,433.30 : 1,978.36 = 873.99 : x
2. Step 2: Convert to fraction form
   1,433.30/1,978.36 = 873.99/x
3. Step 3: Cross multiply
   1,433.30x = 1,978.36 × 873.99
4. Step 4: Simplify right side
   1,433.30x = 1,729,064.67
5. Step 5: Solve for x
   x = 1,729,064.67/1,433.30
6. Step 6: Final answer
   x = 1,206.36