Finding the Fourth Proportional to 8,485.38, 12,716.54 and 5,401.86

Step by Step Solution

1. Step 1: Write the proportion equation
   8,485.38 : 12,716.54 = 5,401.86 : x
2. Step 2: Convert to fraction form
   8,485.38/12,716.54 = 5,401.86/x
3. Step 3: Cross multiply
   8,485.38x = 12,716.54 × 5,401.86
4. Step 4: Simplify right side
   8,485.38x = 68,692,968.76
5. Step 5: Solve for x
   x = 68,692,968.76/8,485.38
6. Step 6: Final answer
   x = 8,095.45