Finding the Fourth Proportional to 1,408.46, 2,111.12 and 714.14

Step by Step Solution

1. Step 1: Write the proportion equation
   1,408.46 : 2,111.12 = 714.14 : x
2. Step 2: Convert to fraction form
   1,408.46/2,111.12 = 714.14/x
3. Step 3: Cross multiply
   1,408.46x = 2,111.12 × 714.14
4. Step 4: Simplify right side
   1,408.46x = 1,507,642.30
5. Step 5: Solve for x
   x = 1,507,642.30/1,408.46
6. Step 6: Final answer
   x = 1,070.42