Finding the Fourth Proportional to 2,131.48, 2,941.56 and 1,187.29

Step by Step Solution

1. Step 1: Write the proportion equation
   2,131.48 : 2,941.56 = 1,187.29 : x
2. Step 2: Convert to fraction form
   2,131.48/2,941.56 = 1,187.29/x
3. Step 3: Cross multiply
   2,131.48x = 2,941.56 × 1,187.29
4. Step 4: Simplify right side
   2,131.48x = 3,492,477.42
5. Step 5: Solve for x
   x = 3,492,477.42/2,131.48
6. Step 6: Final answer
   x = 1,638.52