Finding the Fourth Proportional to 2,131.56, 2,940.73 and 1,291.70

Step by Step Solution

1. Step 1: Write the proportion equation
   2,131.56 : 2,940.73 = 1,291.70 : x
2. Step 2: Convert to fraction form
   2,131.56/2,940.73 = 1,291.70/x
3. Step 3: Cross multiply
   2,131.56x = 2,940.73 × 1,291.70
4. Step 4: Simplify right side
   2,131.56x = 3,798,545.06
5. Step 5: Solve for x
   x = 3,798,545.06/2,131.56
6. Step 6: Final answer
   x = 1,782.05