Finding the Fourth Proportional to 8,809.12, 12,156.58 and 4,830.15

Step by Step Solution

1. Step 1: Write the proportion equation
   8,809.12 : 12,156.58 = 4,830.15 : x
2. Step 2: Convert to fraction form
   8,809.12/12,156.58 = 4,830.15/x
3. Step 3: Cross multiply
   8,809.12x = 12,156.58 × 4,830.15
4. Step 4: Simplify right side
   8,809.12x = 58,718,104.89
5. Step 5: Solve for x
   x = 58,718,104.89/8,809.12
6. Step 6: Final answer
   x = 6,665.60