Finding the Fourth Proportional to 2,153.45, 2,971.30 and 1,408.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,153.45 : 2,971.30 = 1,408.50 : x
2. Step 2: Convert to fraction form
   2,153.45/2,971.30 = 1,408.50/x
3. Step 3: Cross multiply
   2,153.45x = 2,971.30 × 1,408.50
4. Step 4: Simplify right side
   2,153.45x = 4,185,076.05
5. Step 5: Solve for x
   x = 4,185,076.05/2,153.45
6. Step 6: Final answer
   x = 1,943.43