Finding the Fourth Proportional to 10,931.10, 16,413.93 and 8,632.86

Step by Step Solution

1. Step 1: Write the proportion equation
   10,931.10 : 16,413.93 = 8,632.86 : x
2. Step 2: Convert to fraction form
   10,931.10/16,413.93 = 8,632.86/x
3. Step 3: Cross multiply
   10,931.10x = 16,413.93 × 8,632.86
4. Step 4: Simplify right side
   10,931.10x = 141,699,159.74
5. Step 5: Solve for x
   x = 141,699,159.74/10,931.10
6. Step 6: Final answer
   x = 12,962.94