Finding the Fourth Proportional to 9,315.57, 13,973.21 and 3,075.99

Step by Step Solution

1. Step 1: Write the proportion equation
   9,315.57 : 13,973.21 = 3,075.99 : x
2. Step 2: Convert to fraction form
   9,315.57/13,973.21 = 3,075.99/x
3. Step 3: Cross multiply
   9,315.57x = 13,973.21 × 3,075.99
4. Step 4: Simplify right side
   9,315.57x = 42,981,438.85
5. Step 5: Solve for x
   x = 42,981,438.85/9,315.57
6. Step 6: Final answer
   x = 4,613.94