Finding the Fourth Proportional to 1,344.87, 1,856.52 and 879.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,344.87 : 1,856.52 = 879.12 : x
2. Step 2: Convert to fraction form
   1,344.87/1,856.52 = 879.12/x
3. Step 3: Cross multiply
   1,344.87x = 1,856.52 × 879.12
4. Step 4: Simplify right side
   1,344.87x = 1,632,103.86
5. Step 5: Solve for x
   x = 1,632,103.86/1,344.87
6. Step 6: Final answer
   x = 1,213.58