Finding the Fourth Proportional to 13,018.39, 19,528.50 and 5,227.21

Step by Step Solution

1. Step 1: Write the proportion equation
   13,018.39 : 19,528.50 = 5,227.21 : x
2. Step 2: Convert to fraction form
   13,018.39/19,528.50 = 5,227.21/x
3. Step 3: Cross multiply
   13,018.39x = 19,528.50 × 5,227.21
4. Step 4: Simplify right side
   13,018.39x = 102,079,446.71
5. Step 5: Solve for x
   x = 102,079,446.71/13,018.39
6. Step 6: Final answer
   x = 7,841.17