Finding the Fourth Proportional to 22,891.50, 31,590.76 and 12,955.50

Step by Step Solution

1. Step 1: Write the proportion equation
   22,891.50 : 31,590.76 = 12,955.50 : x
2. Step 2: Convert to fraction form
   22,891.50/31,590.76 = 12,955.50/x
3. Step 3: Cross multiply
   22,891.50x = 31,590.76 × 12,955.50
4. Step 4: Simplify right side
   22,891.50x = 409,274,091.18
5. Step 5: Solve for x
   x = 409,274,091.18/22,891.50
6. Step 6: Final answer
   x = 17,878.87