Finding the Fourth Proportional to 9,620.56, 13,274.76 and 5,427.60

Step by Step Solution

1. Step 1: Write the proportion equation
   9,620.56 : 13,274.76 = 5,427.60 : x
2. Step 2: Convert to fraction form
   9,620.56/13,274.76 = 5,427.60/x
3. Step 3: Cross multiply
   9,620.56x = 13,274.76 × 5,427.60
4. Step 4: Simplify right side
   9,620.56x = 72,050,087.38
5. Step 5: Solve for x
   x = 72,050,087.38/9,620.56
6. Step 6: Final answer
   x = 7,489.18