Finding the Fourth Proportional to 2,131.56, 2,941.38 and 1,187.24

Step by Step Solution

1. Step 1: Write the proportion equation
   2,131.56 : 2,941.38 = 1,187.24 : x
2. Step 2: Convert to fraction form
   2,131.56/2,941.38 = 1,187.24/x
3. Step 3: Cross multiply
   2,131.56x = 2,941.38 × 1,187.24
4. Step 4: Simplify right side
   2,131.56x = 3,492,109.28
5. Step 5: Solve for x
   x = 3,492,109.28/2,131.56
6. Step 6: Final answer
   x = 1,638.29