Finding the Fourth Proportional to 8,189.68, 12,287.56 and 4,905.12

Step by Step Solution

1. Step 1: Write the proportion equation
   8,189.68 : 12,287.56 = 4,905.12 : x
2. Step 2: Convert to fraction form
   8,189.68/12,287.56 = 4,905.12/x
3. Step 3: Cross multiply
   8,189.68x = 12,287.56 × 4,905.12
4. Step 4: Simplify right side
   8,189.68x = 60,271,956.31
5. Step 5: Solve for x
   x = 60,271,956.31/8,189.68
6. Step 6: Final answer
   x = 7,359.50