Finding the Fourth Proportional to 1,729.60, 2,383.98 and 1,224.79

Step by Step Solution

1. Step 1: Write the proportion equation
   1,729.60 : 2,383.98 = 1,224.79 : x
2. Step 2: Convert to fraction form
   1,729.60/2,383.98 = 1,224.79/x
3. Step 3: Cross multiply
   1,729.60x = 2,383.98 × 1,224.79
4. Step 4: Simplify right side
   1,729.60x = 2,919,874.86
5. Step 5: Solve for x
   x = 2,919,874.86/1,729.60
6. Step 6: Final answer
   x = 1,688.18