Finding the Fourth Proportional to 2,610.72, 3,602.60 and 1,431.79

Step by Step Solution

1. Step 1: Write the proportion equation
   2,610.72 : 3,602.60 = 1,431.79 : x
2. Step 2: Convert to fraction form
   2,610.72/3,602.60 = 1,431.79/x
3. Step 3: Cross multiply
   2,610.72x = 3,602.60 × 1,431.79
4. Step 4: Simplify right side
   2,610.72x = 5,158,169.37
5. Step 5: Solve for x
   x = 5,158,169.37/2,610.72
6. Step 6: Final answer
   x = 1,975.76