Finding the Fourth Proportional to 31,556.35, 43,549.88 and 18,131.95

Step by Step Solution

1. Step 1: Write the proportion equation
   31,556.35 : 43,549.88 = 18,131.95 : x
2. Step 2: Convert to fraction form
   31,556.35/43,549.88 = 18,131.95/x
3. Step 3: Cross multiply
   31,556.35x = 43,549.88 × 18,131.95
4. Step 4: Simplify right side
   31,556.35x = 789,644,156.01
5. Step 5: Solve for x
   x = 789,644,156.01/31,556.35
6. Step 6: Final answer
   x = 25,023.30