Finding the Fourth Proportional to 1,412.42, 2,118.49 and 864.32

Step by Step Solution

1. Step 1: Write the proportion equation
   1,412.42 : 2,118.49 = 864.32 : x
2. Step 2: Convert to fraction form
   1,412.42/2,118.49 = 864.32/x
3. Step 3: Cross multiply
   1,412.42x = 2,118.49 × 864.32
4. Step 4: Simplify right side
   1,412.42x = 1,831,040.52
5. Step 5: Solve for x
   x = 1,831,040.52/1,412.42
6. Step 6: Final answer
   x = 1,296.39