Finding the Fourth Proportional to 2,632.78, 3,946.42 and 1,072.11

Step by Step Solution

1. Step 1: Write the proportion equation
   2,632.78 : 3,946.42 = 1,072.11 : x
2. Step 2: Convert to fraction form
   2,632.78/3,946.42 = 1,072.11/x
3. Step 3: Cross multiply
   2,632.78x = 3,946.42 × 1,072.11
4. Step 4: Simplify right side
   2,632.78x = 4,230,996.35
5. Step 5: Solve for x
   x = 4,230,996.35/2,632.78
6. Step 6: Final answer
   x = 1,607.05