Finding the Fourth Proportional to 2,612.58, 3,605.40 and 1,433.76

Step by Step Solution

1. Step 1: Write the proportion equation
   2,612.58 : 3,605.40 = 1,433.76 : x
2. Step 2: Convert to fraction form
   2,612.58/3,605.40 = 1,433.76/x
3. Step 3: Cross multiply
   2,612.58x = 3,605.40 × 1,433.76
4. Step 4: Simplify right side
   2,612.58x = 5,169,278.30
5. Step 5: Solve for x
   x = 5,169,278.30/2,612.58
6. Step 6: Final answer
   x = 1,978.61