Finding the Fourth Proportional to 4,978.67, 7,467.98 and 1,280.88

Step by Step Solution

1. Step 1: Write the proportion equation
   4,978.67 : 7,467.98 = 1,280.88 : x
2. Step 2: Convert to fraction form
   4,978.67/7,467.98 = 1,280.88/x
3. Step 3: Cross multiply
   4,978.67x = 7,467.98 × 1,280.88
4. Step 4: Simplify right side
   4,978.67x = 9,565,579.82
5. Step 5: Solve for x
   x = 9,565,579.82/4,978.67
6. Step 6: Final answer
   x = 1,921.31