Finding the Fourth Proportional to 2,989.98, 4,482.79 and 1,408.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,989.98 : 4,482.79 = 1,408.15 : x
2. Step 2: Convert to fraction form
   2,989.98/4,482.79 = 1,408.15/x
3. Step 3: Cross multiply
   2,989.98x = 4,482.79 × 1,408.15
4. Step 4: Simplify right side
   2,989.98x = 6,312,440.74
5. Step 5: Solve for x
   x = 6,312,440.74/2,989.98
6. Step 6: Final answer
   x = 2,111.20