Finding the Fourth Proportional to 2,153.78, 3,236.14 and 1,374.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,153.78 : 3,236.14 = 1,374.15 : x
2. Step 2: Convert to fraction form
   2,153.78/3,236.14 = 1,374.15/x
3. Step 3: Cross multiply
   2,153.78x = 3,236.14 × 1,374.15
4. Step 4: Simplify right side
   2,153.78x = 4,446,941.78
5. Step 5: Solve for x
   x = 4,446,941.78/2,153.78
6. Step 6: Final answer
   x = 2,064.71