Finding the Fourth Proportional to 1,639.52, 2,268.72 and 1,433.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,639.52 : 2,268.72 = 1,433.12 : x
2. Step 2: Convert to fraction form
   1,639.52/2,268.72 = 1,433.12/x
3. Step 3: Cross multiply
   1,639.52x = 2,268.72 × 1,433.12
4. Step 4: Simplify right side
   1,639.52x = 3,251,348.01
5. Step 5: Solve for x
   x = 3,251,348.01/1,639.52
6. Step 6: Final answer
   x = 1,983.11