Finding the Fourth Proportional to 9,928.88, 14,887.56 and 4,078.88

Step by Step Solution

1. Step 1: Write the proportion equation
   9,928.88 : 14,887.56 = 4,078.88 : x
2. Step 2: Convert to fraction form
   9,928.88/14,887.56 = 4,078.88/x
3. Step 3: Cross multiply
   9,928.88x = 14,887.56 × 4,078.88
4. Step 4: Simplify right side
   9,928.88x = 60,724,570.73
5. Step 5: Solve for x
   x = 60,724,570.73/9,928.88
6. Step 6: Final answer
   x = 6,115.95