Finding the Fourth Proportional to 2,131.64, 2,940.78 and 1,235.32

Step by Step Solution

1. Step 1: Write the proportion equation
   2,131.64 : 2,940.78 = 1,235.32 : x
2. Step 2: Convert to fraction form
   2,131.64/2,940.78 = 1,235.32/x
3. Step 3: Cross multiply
   2,131.64x = 2,940.78 × 1,235.32
4. Step 4: Simplify right side
   2,131.64x = 3,632,804.35
5. Step 5: Solve for x
   x = 3,632,804.35/2,131.64
6. Step 6: Final answer
   x = 1,704.23