Finding the Fourth Proportional to 13,018.57, 19,521.97 and 4,131.34

Step by Step Solution

1. Step 1: Write the proportion equation
   13,018.57 : 19,521.97 = 4,131.34 : x
2. Step 2: Convert to fraction form
   13,018.57/19,521.97 = 4,131.34/x
3. Step 3: Cross multiply
   13,018.57x = 19,521.97 × 4,131.34
4. Step 4: Simplify right side
   13,018.57x = 80,651,895.54
5. Step 5: Solve for x
   x = 80,651,895.54/13,018.57
6. Step 6: Final answer
   x = 6,195.14