Finding the Fourth Proportional to 1,638.53, 2,262.78 and 1,401.11

Step by Step Solution

1. Step 1: Write the proportion equation
   1,638.53 : 2,262.78 = 1,401.11 : x
2. Step 2: Convert to fraction form
   1,638.53/2,262.78 = 1,401.11/x
3. Step 3: Cross multiply
   1,638.53x = 2,262.78 × 1,401.11
4. Step 4: Simplify right side
   1,638.53x = 3,170,410.35
5. Step 5: Solve for x
   x = 3,170,410.35/1,638.53
6. Step 6: Final answer
   x = 1,934.91