Finding the Fourth Proportional to 22,806.75, 31,473.32 and 12,870.75

Step by Step Solution

1. Step 1: Write the proportion equation
   22,806.75 : 31,473.32 = 12,870.75 : x
2. Step 2: Convert to fraction form
   22,806.75/31,473.32 = 12,870.75/x
3. Step 3: Cross multiply
   22,806.75x = 31,473.32 × 12,870.75
4. Step 4: Simplify right side
   22,806.75x = 405,085,169.04
5. Step 5: Solve for x
   x = 405,085,169.04/22,806.75
6. Step 6: Final answer
   x = 17,761.64