Finding the Fourth Proportional to 9,315.54, 12,855.50 and 5,066.65

Step by Step Solution

1. Step 1: Write the proportion equation
   9,315.54 : 12,855.50 = 5,066.65 : x
2. Step 2: Convert to fraction form
   9,315.54/12,855.50 = 5,066.65/x
3. Step 3: Cross multiply
   9,315.54x = 12,855.50 × 5,066.65
4. Step 4: Simplify right side
   9,315.54x = 65,134,328.81
5. Step 5: Solve for x
   x = 65,134,328.81/9,315.54
6. Step 6: Final answer
   x = 6,992.01