Finding the Fourth Proportional to 2,612.65, 3,605.51 and 1,433.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,612.65 : 3,605.51 = 1,433.72 : x
2. Step 2: Convert to fraction form
   2,612.65/3,605.51 = 1,433.72/x
3. Step 3: Cross multiply
   2,612.65x = 3,605.51 × 1,433.72
4. Step 4: Simplify right side
   2,612.65x = 5,169,273.77
5. Step 5: Solve for x
   x = 5,169,273.77/2,612.65
6. Step 6: Final answer
   x = 1,978.56