Finding the Fourth Proportional to 13,181.74, 18,196.05 and 8,646.15

Step by Step Solution

1. Step 1: Write the proportion equation
   13,181.74 : 18,196.05 = 8,646.15 : x
2. Step 2: Convert to fraction form
   13,181.74/18,196.05 = 8,646.15/x
3. Step 3: Cross multiply
   13,181.74x = 18,196.05 × 8,646.15
4. Step 4: Simplify right side
   13,181.74x = 157,325,777.71
5. Step 5: Solve for x
   x = 157,325,777.71/13,181.74
6. Step 6: Final answer
   x = 11,935.13