Finding the Fourth Proportional to 18,485.98, 25,521.96 and 12,031.78

Step by Step Solution

1. Step 1: Write the proportion equation
   18,485.98 : 25,521.96 = 12,031.78 : x
2. Step 2: Convert to fraction form
   18,485.98/25,521.96 = 12,031.78/x
3. Step 3: Cross multiply
   18,485.98x = 25,521.96 × 12,031.78
4. Step 4: Simplify right side
   18,485.98x = 307,074,607.89
5. Step 5: Solve for x
   x = 307,074,607.89/18,485.98
6. Step 6: Final answer
   x = 16,611.22