Finding the Fourth Proportional to 11,141.37, 15,384.56 and 7,964.55

Step by Step Solution

1. Step 1: Write the proportion equation
   11,141.37 : 15,384.56 = 7,964.55 : x
2. Step 2: Convert to fraction form
   11,141.37/15,384.56 = 7,964.55/x
3. Step 3: Cross multiply
   11,141.37x = 15,384.56 × 7,964.55
4. Step 4: Simplify right side
   11,141.37x = 122,531,057.53
5. Step 5: Solve for x
   x = 122,531,057.53/11,141.37
6. Step 6: Final answer
   x = 10,997.84