Finding the Fourth Proportional to 2,131.65, 2,941.63 and 1,187.43

Step by Step Solution

1. Step 1: Write the proportion equation
   2,131.65 : 2,941.63 = 1,187.43 : x
2. Step 2: Convert to fraction form
   2,131.65/2,941.63 = 1,187.43/x
3. Step 3: Cross multiply
   2,131.65x = 2,941.63 × 1,187.43
4. Step 4: Simplify right side
   2,131.65x = 3,492,987.77
5. Step 5: Solve for x
   x = 3,492,987.77/2,131.65
6. Step 6: Final answer
   x = 1,638.63