Finding the Fourth Proportional to 2,145.72, 2,960.56 and 1,359.48

Step by Step Solution

1. Step 1: Write the proportion equation
   2,145.72 : 2,960.56 = 1,359.48 : x
2. Step 2: Convert to fraction form
   2,145.72/2,960.56 = 1,359.48/x
3. Step 3: Cross multiply
   2,145.72x = 2,960.56 × 1,359.48
4. Step 4: Simplify right side
   2,145.72x = 4,024,822.11
5. Step 5: Solve for x
   x = 4,024,822.11/2,145.72
6. Step 6: Final answer
   x = 1,875.74