Finding the Fourth Proportional to 1,408.16, 2,113.56 and 996.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,408.16 : 2,113.56 = 996.12 : x
2. Step 2: Convert to fraction form
   1,408.16/2,113.56 = 996.12/x
3. Step 3: Cross multiply
   1,408.16x = 2,113.56 × 996.12
4. Step 4: Simplify right side
   1,408.16x = 2,105,359.39
5. Step 5: Solve for x
   x = 2,105,359.39/1,408.16
6. Step 6: Final answer
   x = 1,495.11