Finding the Fourth Proportional to 5,127.10, 7,074.82 and 2,888.78

Step by Step Solution

1. Step 1: Write the proportion equation
   5,127.10 : 7,074.82 = 2,888.78 : x
2. Step 2: Convert to fraction form
   5,127.10/7,074.82 = 2,888.78/x
3. Step 3: Cross multiply
   5,127.10x = 7,074.82 × 2,888.78
4. Step 4: Simplify right side
   5,127.10x = 20,437,598.52
5. Step 5: Solve for x
   x = 20,437,598.52/5,127.10
6. Step 6: Final answer
   x = 3,986.19