Finding the Fourth Proportional to 8,834.92, 12,178.72 and 7,485.55

Step by Step Solution

1. Step 1: Write the proportion equation
   8,834.92 : 12,178.72 = 7,485.55 : x
2. Step 2: Convert to fraction form
   8,834.92/12,178.72 = 7,485.55/x
3. Step 3: Cross multiply
   8,834.92x = 12,178.72 × 7,485.55
4. Step 4: Simplify right side
   8,834.92x = 91,164,416.21
5. Step 5: Solve for x
   x = 91,164,416.21/8,834.92
6. Step 6: Final answer
   x = 10,318.64