Finding the Fourth Proportional to 8,090.30, 12,130.58 and 5,485.34

Step by Step Solution

1. Step 1: Write the proportion equation
   8,090.30 : 12,130.58 = 5,485.34 : x
2. Step 2: Convert to fraction form
   8,090.30/12,130.58 = 5,485.34/x
3. Step 3: Cross multiply
   8,090.30x = 12,130.58 × 5,485.34
4. Step 4: Simplify right side
   8,090.30x = 66,540,308.76
5. Step 5: Solve for x
   x = 66,540,308.76/8,090.30
6. Step 6: Final answer
   x = 8,224.71