Finding the Fourth Proportional to 2,131.86, 2,941.62 and 1,247.64

Step by Step Solution

1. Step 1: Write the proportion equation
   2,131.86 : 2,941.62 = 1,247.64 : x
2. Step 2: Convert to fraction form
   2,131.86/2,941.62 = 1,247.64/x
3. Step 3: Cross multiply
   2,131.86x = 2,941.62 × 1,247.64
4. Step 4: Simplify right side
   2,131.86x = 3,670,082.78
5. Step 5: Solve for x
   x = 3,670,082.78/2,131.86
6. Step 6: Final answer
   x = 1,721.54