Finding the Fourth Proportional to 21,180.42, 31,791.42 and 17,692.83

Step by Step Solution

1. Step 1: Write the proportion equation
   21,180.42 : 31,791.42 = 17,692.83 : x
2. Step 2: Convert to fraction form
   21,180.42/31,791.42 = 17,692.83/x
3. Step 3: Cross multiply
   21,180.42x = 31,791.42 × 17,692.83
4. Step 4: Simplify right side
   21,180.42x = 562,480,189.52
5. Step 5: Solve for x
   x = 562,480,189.52/21,180.42
6. Step 6: Final answer
   x = 26,556.61