Finding the Fourth Proportional to 1,868.59, 2,804.72 and 1,425.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,868.59 : 2,804.72 = 1,425.72 : x
2. Step 2: Convert to fraction form
   1,868.59/2,804.72 = 1,425.72/x
3. Step 3: Cross multiply
   1,868.59x = 2,804.72 × 1,425.72
4. Step 4: Simplify right side
   1,868.59x = 3,998,738.27
5. Step 5: Solve for x
   x = 3,998,738.27/1,868.59
6. Step 6: Final answer
   x = 2,139.98