Finding the Fourth Proportional to 13,488.42, 18,608.67 and 8,181.30

Step by Step Solution

1. Step 1: Write the proportion equation
   13,488.42 : 18,608.67 = 8,181.30 : x
2. Step 2: Convert to fraction form
   13,488.42/18,608.67 = 8,181.30/x
3. Step 3: Cross multiply
   13,488.42x = 18,608.67 × 8,181.30
4. Step 4: Simplify right side
   13,488.42x = 152,243,111.87
5. Step 5: Solve for x
   x = 152,243,111.87/13,488.42
6. Step 6: Final answer
   x = 11,286.95