Finding the Fourth Proportional to 2,131.48, 2,941.43 and 1,247.11

Step by Step Solution

1. Step 1: Write the proportion equation
   2,131.48 : 2,941.43 = 1,247.11 : x
2. Step 2: Convert to fraction form
   2,131.48/2,941.43 = 1,247.11/x
3. Step 3: Cross multiply
   2,131.48x = 2,941.43 × 1,247.11
4. Step 4: Simplify right side
   2,131.48x = 3,668,265.82
5. Step 5: Solve for x
   x = 3,668,265.82/2,131.48
6. Step 6: Final answer
   x = 1,721.00