Finding the Fourth Proportional to 8,620.89, 12,933.50 and 2,777.37

Step by Step Solution

1. Step 1: Write the proportion equation
   8,620.89 : 12,933.50 = 2,777.37 : x
2. Step 2: Convert to fraction form
   8,620.89/12,933.50 = 2,777.37/x
3. Step 3: Cross multiply
   8,620.89x = 12,933.50 × 2,777.37
4. Step 4: Simplify right side
   8,620.89x = 35,921,101.01
5. Step 5: Solve for x
   x = 35,921,101.01/8,620.89
6. Step 6: Final answer
   x = 4,166.75