Finding the Fourth Proportional to 9,620.16, 13,276.27 and 5,427.60

Step by Step Solution

1. Step 1: Write the proportion equation
   9,620.16 : 13,276.27 = 5,427.60 : x
2. Step 2: Convert to fraction form
   9,620.16/13,276.27 = 5,427.60/x
3. Step 3: Cross multiply
   9,620.16x = 13,276.27 × 5,427.60
4. Step 4: Simplify right side
   9,620.16x = 72,058,283.05
5. Step 5: Solve for x
   x = 72,058,283.05/9,620.16
6. Step 6: Final answer
   x = 7,490.34