Finding the Fourth Proportional to 2,131.92, 2,941.38 and 1,247.76

Step by Step Solution

1. Step 1: Write the proportion equation
   2,131.92 : 2,941.38 = 1,247.76 : x
2. Step 2: Convert to fraction form
   2,131.92/2,941.38 = 1,247.76/x
3. Step 3: Cross multiply
   2,131.92x = 2,941.38 × 1,247.76
4. Step 4: Simplify right side
   2,131.92x = 3,670,136.31
5. Step 5: Solve for x
   x = 3,670,136.31/2,131.92
6. Step 6: Final answer
   x = 1,721.52