Finding the Fourth Proportional to 12,670.14, 17,485.29 and 8,413.86

Step by Step Solution

1. Step 1: Write the proportion equation
   12,670.14 : 17,485.29 = 8,413.86 : x
2. Step 2: Convert to fraction form
   12,670.14/17,485.29 = 8,413.86/x
3. Step 3: Cross multiply
   12,670.14x = 17,485.29 × 8,413.86
4. Step 4: Simplify right side
   12,670.14x = 147,118,847.69
5. Step 5: Solve for x
   x = 147,118,847.69/12,670.14
6. Step 6: Final answer
   x = 11,611.46