Finding the Fourth Proportional to 2,775.78, 4,162.52 and 1,131.21

Step by Step Solution

1. Step 1: Write the proportion equation
   2,775.78 : 4,162.52 = 1,131.21 : x
2. Step 2: Convert to fraction form
   2,775.78/4,162.52 = 1,131.21/x
3. Step 3: Cross multiply
   2,775.78x = 4,162.52 × 1,131.21
4. Step 4: Simplify right side
   2,775.78x = 4,708,678.59
5. Step 5: Solve for x
   x = 4,708,678.59/2,775.78
6. Step 6: Final answer
   x = 1,696.34