Finding the Fourth Proportional to 9,619.24, 13,274.50 and 5,427.40

Step by Step Solution

1. Step 1: Write the proportion equation
   9,619.24 : 13,274.50 = 5,427.40 : x
2. Step 2: Convert to fraction form
   9,619.24/13,274.50 = 5,427.40/x
3. Step 3: Cross multiply
   9,619.24x = 13,274.50 × 5,427.40
4. Step 4: Simplify right side
   9,619.24x = 72,046,021.30
5. Step 5: Solve for x
   x = 72,046,021.30/9,619.24
6. Step 6: Final answer
   x = 7,489.78