Finding the Fourth Proportional to 8,907.91, 12,292.73 and 4,928.78

Step by Step Solution

1. Step 1: Write the proportion equation
   8,907.91 : 12,292.73 = 4,928.78 : x
2. Step 2: Convert to fraction form
   8,907.91/12,292.73 = 4,928.78/x
3. Step 3: Cross multiply
   8,907.91x = 12,292.73 × 4,928.78
4. Step 4: Simplify right side
   8,907.91x = 60,588,186.34
5. Step 5: Solve for x
   x = 60,588,186.34/8,907.91
6. Step 6: Final answer
   x = 6,801.62