Finding the Fourth Proportional to 3,989.78, 5,496.98 and 2,925.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,989.78 : 5,496.98 = 2,925.72 : x
2. Step 2: Convert to fraction form
   3,989.78/5,496.98 = 2,925.72/x
3. Step 3: Cross multiply
   3,989.78x = 5,496.98 × 2,925.72
4. Step 4: Simplify right side
   3,989.78x = 16,082,624.33
5. Step 5: Solve for x
   x = 16,082,624.33/3,989.78
6. Step 6: Final answer
   x = 4,030.96