Finding the Fourth Proportional to 9,315.78, 12,855.81 and 5,066.84

Step by Step Solution

1. Step 1: Write the proportion equation
   9,315.78 : 12,855.81 = 5,066.84 : x
2. Step 2: Convert to fraction form
   9,315.78/12,855.81 = 5,066.84/x
3. Step 3: Cross multiply
   9,315.78x = 12,855.81 × 5,066.84
4. Step 4: Simplify right side
   9,315.78x = 65,138,332.34
5. Step 5: Solve for x
   x = 65,138,332.34/9,315.78
6. Step 6: Final answer
   x = 6,992.26