Finding the Fourth Proportional to 2,602.56, 3,591.36 and 1,423.60

Step by Step Solution

1. Step 1: Write the proportion equation
   2,602.56 : 3,591.36 = 1,423.60 : x
2. Step 2: Convert to fraction form
   2,602.56/3,591.36 = 1,423.60/x
3. Step 3: Cross multiply
   2,602.56x = 3,591.36 × 1,423.60
4. Step 4: Simplify right side
   2,602.56x = 5,112,660.10
5. Step 5: Solve for x
   x = 5,112,660.10/2,602.56
6. Step 6: Final answer
   x = 1,964.47