Finding the Fourth Proportional to 1,426.44, 2,142.50 and 879.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,426.44 : 2,142.50 = 879.69 : x
2. Step 2: Convert to fraction form
   1,426.44/2,142.50 = 879.69/x
3. Step 3: Cross multiply
   1,426.44x = 2,142.50 × 879.69
4. Step 4: Simplify right side
   1,426.44x = 1,884,731.43
5. Step 5: Solve for x
   x = 1,884,731.43/1,426.44
6. Step 6: Final answer
   x = 1,321.28