Finding the Fourth Proportional to 2,131.62, 2,941.65 and 1,247.25

Step by Step Solution

1. Step 1: Write the proportion equation
   2,131.62 : 2,941.65 = 1,247.25 : x
2. Step 2: Convert to fraction form
   2,131.62/2,941.65 = 1,247.25/x
3. Step 3: Cross multiply
   2,131.62x = 2,941.65 × 1,247.25
4. Step 4: Simplify right side
   2,131.62x = 3,668,979.32
5. Step 5: Solve for x
   x = 3,668,979.32/2,131.62
6. Step 6: Final answer
   x = 1,721.22