Finding the Fourth Proportional to 1,939.98, 2,678.57 and 1,194.95

Step by Step Solution

1. Step 1: Write the proportion equation
   1,939.98 : 2,678.57 = 1,194.95 : x
2. Step 2: Convert to fraction form
   1,939.98/2,678.57 = 1,194.95/x
3. Step 3: Cross multiply
   1,939.98x = 2,678.57 × 1,194.95
4. Step 4: Simplify right side
   1,939.98x = 3,200,762.42
5. Step 5: Solve for x
   x = 3,200,762.42/1,939.98
6. Step 6: Final answer
   x = 1,649.89