Finding the Fourth Proportional to 13,780.77, 18,994.31 and 10,549.48

Step by Step Solution

1. Step 1: Write the proportion equation
   13,780.77 : 18,994.31 = 10,549.48 : x
2. Step 2: Convert to fraction form
   13,780.77/18,994.31 = 10,549.48/x
3. Step 3: Cross multiply
   13,780.77x = 18,994.31 × 10,549.48
4. Step 4: Simplify right side
   13,780.77x = 200,380,093.46
5. Step 5: Solve for x
   x = 200,380,093.46/13,780.77
6. Step 6: Final answer
   x = 14,540.56