Finding the Fourth Proportional to 2,131.46, 2,941.39 and 1,187.23

Step by Step Solution

1. Step 1: Write the proportion equation
   2,131.46 : 2,941.39 = 1,187.23 : x
2. Step 2: Convert to fraction form
   2,131.46/2,941.39 = 1,187.23/x
3. Step 3: Cross multiply
   2,131.46x = 2,941.39 × 1,187.23
4. Step 4: Simplify right side
   2,131.46x = 3,492,085.81
5. Step 5: Solve for x
   x = 3,492,085.81/2,131.46
6. Step 6: Final answer
   x = 1,638.35