Finding the Fourth Proportional to 2,131.74, 2,941.77 and 1,247.37

Step by Step Solution

1. Step 1: Write the proportion equation
   2,131.74 : 2,941.77 = 1,247.37 : x
2. Step 2: Convert to fraction form
   2,131.74/2,941.77 = 1,247.37/x
3. Step 3: Cross multiply
   2,131.74x = 2,941.77 × 1,247.37
4. Step 4: Simplify right side
   2,131.74x = 3,669,475.64
5. Step 5: Solve for x
   x = 3,669,475.64/2,131.74
6. Step 6: Final answer
   x = 1,721.35