Finding the Fourth Proportional to 13,667.58, 18,860.31 and 8,077.50

Step by Step Solution

1. Step 1: Write the proportion equation
   13,667.58 : 18,860.31 = 8,077.50 : x
2. Step 2: Convert to fraction form
   13,667.58/18,860.31 = 8,077.50/x
3. Step 3: Cross multiply
   13,667.58x = 18,860.31 × 8,077.50
4. Step 4: Simplify right side
   13,667.58x = 152,344,154.03
5. Step 5: Solve for x
   x = 152,344,154.03/13,667.58
6. Step 6: Final answer
   x = 11,146.39