Finding the Fourth Proportional to 9,310.84, 13,968.32 and 3,072.78

Step by Step Solution

1. Step 1: Write the proportion equation
   9,310.84 : 13,968.32 = 3,072.78 : x
2. Step 2: Convert to fraction form
   9,310.84/13,968.32 = 3,072.78/x
3. Step 3: Cross multiply
   9,310.84x = 13,968.32 × 3,072.78
4. Step 4: Simplify right side
   9,310.84x = 42,921,574.33
5. Step 5: Solve for x
   x = 42,921,574.33/9,310.84
6. Step 6: Final answer
   x = 4,609.85