Finding the Fourth Proportional to 1,325.43, 1,978.61 and 1,229.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,325.43 : 1,978.61 = 1,229.30 : x
2. Step 2: Convert to fraction form
   1,325.43/1,978.61 = 1,229.30/x
3. Step 3: Cross multiply
   1,325.43x = 1,978.61 × 1,229.30
4. Step 4: Simplify right side
   1,325.43x = 2,432,289.23
5. Step 5: Solve for x
   x = 2,432,289.23/1,325.43
6. Step 6: Final answer
   x = 1,835.09