Finding the Fourth Proportional to 23,170.79, 31,975.86 and 12,560.50

Step by Step Solution

1. Step 1: Write the proportion equation
   23,170.79 : 31,975.86 = 12,560.50 : x
2. Step 2: Convert to fraction form
   23,170.79/31,975.86 = 12,560.50/x
3. Step 3: Cross multiply
   23,170.79x = 31,975.86 × 12,560.50
4. Step 4: Simplify right side
   23,170.79x = 401,632,876.60
5. Step 5: Solve for x
   x = 401,632,876.60/23,170.79
6. Step 6: Final answer
   x = 17,333.58