Finding the Fourth Proportional to 1,408.56, 2,111.64 and 714.48

Step by Step Solution

1. Step 1: Write the proportion equation
   1,408.56 : 2,111.64 = 714.48 : x
2. Step 2: Convert to fraction form
   1,408.56/2,111.64 = 714.48/x
3. Step 3: Cross multiply
   1,408.56x = 2,111.64 × 714.48
4. Step 4: Simplify right side
   1,408.56x = 1,508,724.55
5. Step 5: Solve for x
   x = 1,508,724.55/1,408.56
6. Step 6: Final answer
   x = 1,071.11