Finding the Fourth Proportional to 1,889.86, 2,607.61 and 1,143.67

Step by Step Solution

1. Step 1: Write the proportion equation
   1,889.86 : 2,607.61 = 1,143.67 : x
2. Step 2: Convert to fraction form
   1,889.86/2,607.61 = 1,143.67/x
3. Step 3: Cross multiply
   1,889.86x = 2,607.61 × 1,143.67
4. Step 4: Simplify right side
   1,889.86x = 2,982,245.33
5. Step 5: Solve for x
   x = 2,982,245.33/1,889.86
6. Step 6: Final answer
   x = 1,578.02