Finding the Fourth Proportional to 1,433.21, 1,978.79 and 1,101.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,433.21 : 1,978.79 = 1,101.05 : x
2. Step 2: Convert to fraction form
   1,433.21/1,978.79 = 1,101.05/x
3. Step 3: Cross multiply
   1,433.21x = 1,978.79 × 1,101.05
4. Step 4: Simplify right side
   1,433.21x = 2,178,746.73
5. Step 5: Solve for x
   x = 2,178,746.73/1,433.21
6. Step 6: Final answer
   x = 1,520.19