Finding the Fourth Proportional to 5,925.76, 8,890.71 and 2,638.54

Step by Step Solution

1. Step 1: Write the proportion equation
   5,925.76 : 8,890.71 = 2,638.54 : x
2. Step 2: Convert to fraction form
   5,925.76/8,890.71 = 2,638.54/x
3. Step 3: Cross multiply
   5,925.76x = 8,890.71 × 2,638.54
4. Step 4: Simplify right side
   5,925.76x = 23,458,493.96
5. Step 5: Solve for x
   x = 23,458,493.96/5,925.76
6. Step 6: Final answer
   x = 3,958.73