Finding the Fourth Proportional to 2,123.94, 3,185.69 and 1,300.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,123.94 : 3,185.69 = 1,300.78 : x
2. Step 2: Convert to fraction form
   2,123.94/3,185.69 = 1,300.78/x
3. Step 3: Cross multiply
   2,123.94x = 3,185.69 × 1,300.78
4. Step 4: Simplify right side
   2,123.94x = 4,143,867.37
5. Step 5: Solve for x
   x = 4,143,867.37/2,123.94
6. Step 6: Final answer
   x = 1,951.03