Finding the Fourth Proportional to 8,622.17, 12,930.87 and 2,380.72

Step by Step Solution

1. Step 1: Write the proportion equation
   8,622.17 : 12,930.87 = 2,380.72 : x
2. Step 2: Convert to fraction form
   8,622.17/12,930.87 = 2,380.72/x
3. Step 3: Cross multiply
   8,622.17x = 12,930.87 × 2,380.72
4. Step 4: Simplify right side
   8,622.17x = 30,784,780.83
5. Step 5: Solve for x
   x = 30,784,780.83/8,622.17
6. Step 6: Final answer
   x = 3,570.42