Finding the Fourth Proportional to 1,433.09, 1,978.32 and 1,101.40

Step by Step Solution

1. Step 1: Write the proportion equation
   1,433.09 : 1,978.32 = 1,101.40 : x
2. Step 2: Convert to fraction form
   1,433.09/1,978.32 = 1,101.40/x
3. Step 3: Cross multiply
   1,433.09x = 1,978.32 × 1,101.40
4. Step 4: Simplify right side
   1,433.09x = 2,178,920.83
5. Step 5: Solve for x
   x = 2,178,920.83/1,433.09
6. Step 6: Final answer
   x = 1,520.43