Finding the Fourth Proportional to 9,319.16, 12,860.42 and 5,127.42

Step by Step Solution

1. Step 1: Write the proportion equation
   9,319.16 : 12,860.42 = 5,127.42 : x
2. Step 2: Convert to fraction form
   9,319.16/12,860.42 = 5,127.42/x
3. Step 3: Cross multiply
   9,319.16x = 12,860.42 × 5,127.42
4. Step 4: Simplify right side
   9,319.16x = 65,940,774.72
5. Step 5: Solve for x
   x = 65,940,774.72/9,319.16
6. Step 6: Final answer
   x = 7,075.83