Finding the Fourth Proportional to 2,131.77, 2,941.82 and 1,247.39

Step by Step Solution

1. Step 1: Write the proportion equation
   2,131.77 : 2,941.82 = 1,247.39 : x
2. Step 2: Convert to fraction form
   2,131.77/2,941.82 = 1,247.39/x
3. Step 3: Cross multiply
   2,131.77x = 2,941.82 × 1,247.39
4. Step 4: Simplify right side
   2,131.77x = 3,669,582.14
5. Step 5: Solve for x
   x = 3,669,582.14/2,131.77
6. Step 6: Final answer
   x = 1,721.38