Finding the Fourth Proportional to 2,131.85, 2,941.79 and 1,187.49

Step by Step Solution

1. Step 1: Write the proportion equation
   2,131.85 : 2,941.79 = 1,187.49 : x
2. Step 2: Convert to fraction form
   2,131.85/2,941.79 = 1,187.49/x
3. Step 3: Cross multiply
   2,131.85x = 2,941.79 × 1,187.49
4. Step 4: Simplify right side
   2,131.85x = 3,493,351.30
5. Step 5: Solve for x
   x = 3,493,351.30/2,131.85
6. Step 6: Final answer
   x = 1,638.65