Finding the Fourth Proportional to 2,131.22, 2,940.91 and 1,186.94

Step by Step Solution

1. Step 1: Write the proportion equation
   2,131.22 : 2,940.91 = 1,186.94 : x
2. Step 2: Convert to fraction form
   2,131.22/2,940.91 = 1,186.94/x
3. Step 3: Cross multiply
   2,131.22x = 2,940.91 × 1,186.94
4. Step 4: Simplify right side
   2,131.22x = 3,490,683.72
5. Step 5: Solve for x
   x = 3,490,683.72/2,131.22
6. Step 6: Final answer
   x = 1,637.88