Finding the Fourth Proportional to 2,131.16, 2,941.04 and 1,187

Step by Step Solution

1. Step 1: Write the proportion equation
   2,131.16 : 2,941.04 = 1,187 : x
2. Step 2: Convert to fraction form
   2,131.16/2,941.04 = 1,187/x
3. Step 3: Cross multiply
   2,131.16x = 2,941.04 × 1,187
4. Step 4: Simplify right side
   2,131.16x = 3,491,014.48
5. Step 5: Solve for x
   x = 3,491,014.48/2,131.16
6. Step 6: Final answer
   x = 1,638.08