Finding the Fourth Proportional to 9,786.42, 13,505.31 and 5,310.36

Step by Step Solution

1. Step 1: Write the proportion equation
   9,786.42 : 13,505.31 = 5,310.36 : x
2. Step 2: Convert to fraction form
   9,786.42/13,505.31 = 5,310.36/x
3. Step 3: Cross multiply
   9,786.42x = 13,505.31 × 5,310.36
4. Step 4: Simplify right side
   9,786.42x = 71,718,058.01
5. Step 5: Solve for x
   x = 71,718,058.01/9,786.42
6. Step 6: Final answer
   x = 7,328.32