Finding the Fourth Proportional to 2,131.65, 2,942.40 and 1,292.34

Step by Step Solution

1. Step 1: Write the proportion equation
   2,131.65 : 2,942.40 = 1,292.34 : x
2. Step 2: Convert to fraction form
   2,131.65/2,942.40 = 1,292.34/x
3. Step 3: Cross multiply
   2,131.65x = 2,942.40 × 1,292.34
4. Step 4: Simplify right side
   2,131.65x = 3,802,581.22
5. Step 5: Solve for x
   x = 3,802,581.22/2,131.65
6. Step 6: Final answer
   x = 1,783.87