Finding the Fourth Proportional to 23,486.34, 32,413.20 and 12,878

Step by Step Solution

1. Step 1: Write the proportion equation
   23,486.34 : 32,413.20 = 12,878 : x
2. Step 2: Convert to fraction form
   23,486.34/32,413.20 = 12,878/x
3. Step 3: Cross multiply
   23,486.34x = 32,413.20 × 12,878
4. Step 4: Simplify right side
   23,486.34x = 417,417,189.60
5. Step 5: Solve for x
   x = 417,417,189.60/23,486.34
6. Step 6: Final answer
   x = 17,772.76