Finding the Fourth Proportional to 22,587.63, 31,171.37 and 13,156.80

Step by Step Solution

1. Step 1: Write the proportion equation
   22,587.63 : 31,171.37 = 13,156.80 : x
2. Step 2: Convert to fraction form
   22,587.63/31,171.37 = 13,156.80/x
3. Step 3: Cross multiply
   22,587.63x = 31,171.37 × 13,156.80
4. Step 4: Simplify right side
   22,587.63x = 410,115,480.82
5. Step 5: Solve for x
   x = 410,115,480.82/22,587.63
6. Step 6: Final answer
   x = 18,156.64