Finding the Fourth Proportional to 2,131.41, 2,941.57 and 1,187.36

Step by Step Solution

1. Step 1: Write the proportion equation
   2,131.41 : 2,941.57 = 1,187.36 : x
2. Step 2: Convert to fraction form
   2,131.41/2,941.57 = 1,187.36/x
3. Step 3: Cross multiply
   2,131.41x = 2,941.57 × 1,187.36
4. Step 4: Simplify right side
   2,131.41x = 3,492,693.68
5. Step 5: Solve for x
   x = 3,492,693.68/2,131.41
6. Step 6: Final answer
   x = 1,638.67