Finding the Fourth Proportional to 11,621.28, 17,436.24 and 5,384.28

Step by Step Solution

1. Step 1: Write the proportion equation
   11,621.28 : 17,436.24 = 5,384.28 : x
2. Step 2: Convert to fraction form
   11,621.28/17,436.24 = 5,384.28/x
3. Step 3: Cross multiply
   11,621.28x = 17,436.24 × 5,384.28
4. Step 4: Simplify right side
   11,621.28x = 93,881,598.31
5. Step 5: Solve for x
   x = 93,881,598.31/11,621.28
6. Step 6: Final answer
   x = 8,078.42