Finding the Fourth Proportional to 5,380.88, 8,026.18 and 5,147.60

Step by Step Solution

1. Step 1: Write the proportion equation
   5,380.88 : 8,026.18 = 5,147.60 : x
2. Step 2: Convert to fraction form
   5,380.88/8,026.18 = 5,147.60/x
3. Step 3: Cross multiply
   5,380.88x = 8,026.18 × 5,147.60
4. Step 4: Simplify right side
   5,380.88x = 41,315,564.17
5. Step 5: Solve for x
   x = 41,315,564.17/5,380.88
6. Step 6: Final answer
   x = 7,678.22