Finding the Fourth Proportional to 9,485.66, 13,090.86 and 5,507.21

Step by Step Solution

1. Step 1: Write the proportion equation
   9,485.66 : 13,090.86 = 5,507.21 : x
2. Step 2: Convert to fraction form
   9,485.66/13,090.86 = 5,507.21/x
3. Step 3: Cross multiply
   9,485.66x = 13,090.86 × 5,507.21
4. Step 4: Simplify right side
   9,485.66x = 72,094,049.65
5. Step 5: Solve for x
   x = 72,094,049.65/9,485.66
6. Step 6: Final answer
   x = 7,600.32