Finding the Fourth Proportional to 5,145.89, 7,101.34 and 2,788.03

Step by Step Solution

1. Step 1: Write the proportion equation
   5,145.89 : 7,101.34 = 2,788.03 : x
2. Step 2: Convert to fraction form
   5,145.89/7,101.34 = 2,788.03/x
3. Step 3: Cross multiply
   5,145.89x = 7,101.34 × 2,788.03
4. Step 4: Simplify right side
   5,145.89x = 19,798,747.38
5. Step 5: Solve for x
   x = 19,798,747.38/5,145.89
6. Step 6: Final answer
   x = 3,847.49