Finding the Fourth Proportional to 8,892.45, 12,271.70 and 4,913.55

Step by Step Solution

1. Step 1: Write the proportion equation
   8,892.45 : 12,271.70 = 4,913.55 : x
2. Step 2: Convert to fraction form
   8,892.45/12,271.70 = 4,913.55/x
3. Step 3: Cross multiply
   8,892.45x = 12,271.70 × 4,913.55
4. Step 4: Simplify right side
   8,892.45x = 60,297,623.82
5. Step 5: Solve for x
   x = 60,297,623.82/8,892.45
6. Step 6: Final answer
   x = 6,780.77