Finding the Fourth Proportional to 1,401.89, 2,102.67 and 743.51

Step by Step Solution

1. Step 1: Write the proportion equation
   1,401.89 : 2,102.67 = 743.51 : x
2. Step 2: Convert to fraction form
   1,401.89/2,102.67 = 743.51/x
3. Step 3: Cross multiply
   1,401.89x = 2,102.67 × 743.51
4. Step 4: Simplify right side
   1,401.89x = 1,563,361.43
5. Step 5: Solve for x
   x = 1,563,361.43/1,401.89
6. Step 6: Final answer
   x = 1,115.18