Finding the Fourth Proportional to 2,612.76, 3,605.46 and 1,433.60

Step by Step Solution

1. Step 1: Write the proportion equation
   2,612.76 : 3,605.46 = 1,433.60 : x
2. Step 2: Convert to fraction form
   2,612.76/3,605.46 = 1,433.60/x
3. Step 3: Cross multiply
   2,612.76x = 3,605.46 × 1,433.60
4. Step 4: Simplify right side
   2,612.76x = 5,168,787.46
5. Step 5: Solve for x
   x = 5,168,787.46/2,612.76
6. Step 6: Final answer
   x = 1,978.29