Finding the Fourth Proportional to 2,142.80, 2,958.90 and 1,358.24

Step by Step Solution

1. Step 1: Write the proportion equation
   2,142.80 : 2,958.90 = 1,358.24 : x
2. Step 2: Convert to fraction form
   2,142.80/2,958.90 = 1,358.24/x
3. Step 3: Cross multiply
   2,142.80x = 2,958.90 × 1,358.24
4. Step 4: Simplify right side
   2,142.80x = 4,018,896.34
5. Step 5: Solve for x
   x = 4,018,896.34/2,142.80
6. Step 6: Final answer
   x = 1,875.53