Finding the Fourth Proportional to 13,187.34, 19,767.33 and 8,245.63

Step by Step Solution

1. Step 1: Write the proportion equation
   13,187.34 : 19,767.33 = 8,245.63 : x
2. Step 2: Convert to fraction form
   13,187.34/19,767.33 = 8,245.63/x
3. Step 3: Cross multiply
   13,187.34x = 19,767.33 × 8,245.63
4. Step 4: Simplify right side
   13,187.34x = 162,994,060.46
5. Step 5: Solve for x
   x = 162,994,060.46/13,187.34
6. Step 6: Final answer
   x = 12,359.89