Finding the Fourth Proportional to 4,978.05, 7,466.88 and 1,280.34

Step by Step Solution

1. Step 1: Write the proportion equation
   4,978.05 : 7,466.88 = 1,280.34 : x
2. Step 2: Convert to fraction form
   4,978.05/7,466.88 = 1,280.34/x
3. Step 3: Cross multiply
   4,978.05x = 7,466.88 × 1,280.34
4. Step 4: Simplify right side
   4,978.05x = 9,560,145.14
5. Step 5: Solve for x
   x = 9,560,145.14/4,978.05
6. Step 6: Final answer
   x = 1,920.46