Finding the Fourth Proportional to 8,674.30, 12,118.10 and 8,674.30

Step by Step Solution

1. Step 1: Write the proportion equation
   8,674.30 : 12,118.10 = 8,674.30 : x
2. Step 2: Convert to fraction form
   8,674.30/12,118.10 = 8,674.30/x
3. Step 3: Cross multiply
   8,674.30x = 12,118.10 × 8,674.30
4. Step 4: Simplify right side
   8,674.30x = 105,116,034.83
5. Step 5: Solve for x
   x = 105,116,034.83/8,674.30
6. Step 6: Final answer
   x = 12,118.10