Finding the Fourth Proportional to 5,248.53, 7,242.89 and 2,890.89

Step by Step Solution

1. Step 1: Write the proportion equation
   5,248.53 : 7,242.89 = 2,890.89 : x
2. Step 2: Convert to fraction form
   5,248.53/7,242.89 = 2,890.89/x
3. Step 3: Cross multiply
   5,248.53x = 7,242.89 × 2,890.89
4. Step 4: Simplify right side
   5,248.53x = 20,938,383.82
5. Step 5: Solve for x
   x = 20,938,383.82/5,248.53
6. Step 6: Final answer
   x = 3,989.38