Finding the Fourth Proportional to 7,089.30, 9,783.18 and 3,945.42

Step by Step Solution

1. Step 1: Write the proportion equation
   7,089.30 : 9,783.18 = 3,945.42 : x
2. Step 2: Convert to fraction form
   7,089.30/9,783.18 = 3,945.42/x
3. Step 3: Cross multiply
   7,089.30x = 9,783.18 × 3,945.42
4. Step 4: Simplify right side
   7,089.30x = 38,598,754.04
5. Step 5: Solve for x
   x = 38,598,754.04/7,089.30
6. Step 6: Final answer
   x = 5,444.65