Finding the Fourth Proportional to 22,891.93, 31,591.56 and 12,820.33

Step by Step Solution

1. Step 1: Write the proportion equation
   22,891.93 : 31,591.56 = 12,820.33 : x
2. Step 2: Convert to fraction form
   22,891.93/31,591.56 = 12,820.33/x
3. Step 3: Cross multiply
   22,891.93x = 31,591.56 × 12,820.33
4. Step 4: Simplify right side
   22,891.93x = 405,014,224.41
5. Step 5: Solve for x
   x = 405,014,224.41/22,891.93
6. Step 6: Final answer
   x = 17,692.45