Finding the Fourth Proportional to 1,445.43, 2,168.37 and 742.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,445.43 : 2,168.37 = 742.89 : x
2. Step 2: Convert to fraction form
   1,445.43/2,168.37 = 742.89/x
3. Step 3: Cross multiply
   1,445.43x = 2,168.37 × 742.89
4. Step 4: Simplify right side
   1,445.43x = 1,610,860.39
5. Step 5: Solve for x
   x = 1,610,860.39/1,445.43
6. Step 6: Final answer
   x = 1,114.45