Finding the Fourth Proportional to 9,725.05, 13,420.56 and 5,533.30

Step by Step Solution

1. Step 1: Write the proportion equation
   9,725.05 : 13,420.56 = 5,533.30 : x
2. Step 2: Convert to fraction form
   9,725.05/13,420.56 = 5,533.30/x
3. Step 3: Cross multiply
   9,725.05x = 13,420.56 × 5,533.30
4. Step 4: Simplify right side
   9,725.05x = 74,259,984.65
5. Step 5: Solve for x
   x = 74,259,984.65/9,725.05
6. Step 6: Final answer
   x = 7,635.95