Finding the Fourth Proportional to 2,131.99, 2,939.49 and 1,778.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,131.99 : 2,939.49 = 1,778.42 : x
2. Step 2: Convert to fraction form
   2,131.99/2,939.49 = 1,778.42/x
3. Step 3: Cross multiply
   2,131.99x = 2,939.49 × 1,778.42
4. Step 4: Simplify right side
   2,131.99x = 5,227,655.15
5. Step 5: Solve for x
   x = 5,227,655.15/2,131.99
6. Step 6: Final answer
   x = 2,452.01