Finding the Fourth Proportional to 2,131.86, 3,194.45 and 1,399.82

Step by Step Solution

1. Step 1: Write the proportion equation
   2,131.86 : 3,194.45 = 1,399.82 : x
2. Step 2: Convert to fraction form
   2,131.86/3,194.45 = 1,399.82/x
3. Step 3: Cross multiply
   2,131.86x = 3,194.45 × 1,399.82
4. Step 4: Simplify right side
   2,131.86x = 4,471,655.99
5. Step 5: Solve for x
   x = 4,471,655.99/2,131.86
6. Step 6: Final answer
   x = 2,097.54