Finding the Fourth Proportional to 2,612.64, 3,605.38 and 1,433.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,612.64 : 3,605.38 = 1,433.72 : x
2. Step 2: Convert to fraction form
   2,612.64/3,605.38 = 1,433.72/x
3. Step 3: Cross multiply
   2,612.64x = 3,605.38 × 1,433.72
4. Step 4: Simplify right side
   2,612.64x = 5,169,105.41
5. Step 5: Solve for x
   x = 5,169,105.41/2,612.64
6. Step 6: Final answer
   x = 1,978.50