Finding the Fourth Proportional to 9,362.64, 12,921.24 and 5,384.88

Step by Step Solution

1. Step 1: Write the proportion equation
   9,362.64 : 12,921.24 = 5,384.88 : x
2. Step 2: Convert to fraction form
   9,362.64/12,921.24 = 5,384.88/x
3. Step 3: Cross multiply
   9,362.64x = 12,921.24 × 5,384.88
4. Step 4: Simplify right side
   9,362.64x = 69,579,326.85
5. Step 5: Solve for x
   x = 69,579,326.85/9,362.64
6. Step 6: Final answer
   x = 7,431.59