Finding the Fourth Proportional to 8,777.98, 13,167 and 2,538.50

Step by Step Solution

1. Step 1: Write the proportion equation
   8,777.98 : 13,167 = 2,538.50 : x
2. Step 2: Convert to fraction form
   8,777.98/13,167 = 2,538.50/x
3. Step 3: Cross multiply
   8,777.98x = 13,167 × 2,538.50
4. Step 4: Simplify right side
   8,777.98x = 33,424,429.50
5. Step 5: Solve for x
   x = 33,424,429.50/8,777.98
6. Step 6: Final answer
   x = 3,807.76