Finding the Fourth Proportional to 2,978.06, 4,466.48 and 1,128.53

Step by Step Solution

1. Step 1: Write the proportion equation
   2,978.06 : 4,466.48 = 1,128.53 : x
2. Step 2: Convert to fraction form
   2,978.06/4,466.48 = 1,128.53/x
3. Step 3: Cross multiply
   2,978.06x = 4,466.48 × 1,128.53
4. Step 4: Simplify right side
   2,978.06x = 5,040,562.20
5. Step 5: Solve for x
   x = 5,040,562.20/2,978.06
6. Step 6: Final answer
   x = 1,692.57