Finding the Fourth Proportional to 5,918.78, 8,835.50 and 5,144.16

Step by Step Solution

1. Step 1: Write the proportion equation
   5,918.78 : 8,835.50 = 5,144.16 : x
2. Step 2: Convert to fraction form
   5,918.78/8,835.50 = 5,144.16/x
3. Step 3: Cross multiply
   5,918.78x = 8,835.50 × 5,144.16
4. Step 4: Simplify right side
   5,918.78x = 45,451,225.68
5. Step 5: Solve for x
   x = 45,451,225.68/5,918.78
6. Step 6: Final answer
   x = 7,679.15