Finding the Fourth Proportional to 9,075.40, 12,518.61 and 5,712.37

Step by Step Solution

1. Step 1: Write the proportion equation
   9,075.40 : 12,518.61 = 5,712.37 : x
2. Step 2: Convert to fraction form
   9,075.40/12,518.61 = 5,712.37/x
3. Step 3: Cross multiply
   9,075.40x = 12,518.61 × 5,712.37
4. Step 4: Simplify right side
   9,075.40x = 71,510,932.21
5. Step 5: Solve for x
   x = 71,510,932.21/9,075.40
6. Step 6: Final answer
   x = 7,879.65