Finding the Fourth Proportional to 1,408.22, 2,111.57 and 998.16

Step by Step Solution

1. Step 1: Write the proportion equation
   1,408.22 : 2,111.57 = 998.16 : x
2. Step 2: Convert to fraction form
   1,408.22/2,111.57 = 998.16/x
3. Step 3: Cross multiply
   1,408.22x = 2,111.57 × 998.16
4. Step 4: Simplify right side
   1,408.22x = 2,107,684.71
5. Step 5: Solve for x
   x = 2,107,684.71/1,408.22
6. Step 6: Final answer
   x = 1,496.70