Finding the Fourth Proportional to 9,853.56, 13,597.92 and 5,377.20

Step by Step Solution

1. Step 1: Write the proportion equation
   9,853.56 : 13,597.92 = 5,377.20 : x
2. Step 2: Convert to fraction form
   9,853.56/13,597.92 = 5,377.20/x
3. Step 3: Cross multiply
   9,853.56x = 13,597.92 × 5,377.20
4. Step 4: Simplify right side
   9,853.56x = 73,118,735.42
5. Step 5: Solve for x
   x = 73,118,735.42/9,853.56
6. Step 6: Final answer
   x = 7,420.54