Finding the Fourth Proportional to 13,018.86, 19,524.42 and 5,522.31

Step by Step Solution

1. Step 1: Write the proportion equation
   13,018.86 : 19,524.42 = 5,522.31 : x
2. Step 2: Convert to fraction form
   13,018.86/19,524.42 = 5,522.31/x
3. Step 3: Cross multiply
   13,018.86x = 19,524.42 × 5,522.31
4. Step 4: Simplify right side
   13,018.86x = 107,819,899.81
5. Step 5: Solve for x
   x = 107,819,899.81/13,018.86
6. Step 6: Final answer
   x = 8,281.82