Finding the Fourth Proportional to 1,422.42, 2,132.24 and 729.40

Step by Step Solution

1. Step 1: Write the proportion equation
   1,422.42 : 2,132.24 = 729.40 : x
2. Step 2: Convert to fraction form
   1,422.42/2,132.24 = 729.40/x
3. Step 3: Cross multiply
   1,422.42x = 2,132.24 × 729.40
4. Step 4: Simplify right side
   1,422.42x = 1,555,255.86
5. Step 5: Solve for x
   x = 1,555,255.86/1,422.42
6. Step 6: Final answer
   x = 1,093.39