Finding the Fourth Proportional to 1,433.83, 1,978.77 and 1,079.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,433.83 : 1,978.77 = 1,079.12 : x
2. Step 2: Convert to fraction form
   1,433.83/1,978.77 = 1,079.12/x
3. Step 3: Cross multiply
   1,433.83x = 1,978.77 × 1,079.12
4. Step 4: Simplify right side
   1,433.83x = 2,135,314.99
5. Step 5: Solve for x
   x = 2,135,314.99/1,433.83
6. Step 6: Final answer
   x = 1,489.24