Finding the Fourth Proportional to 7,089.57, 9,783.50 and 3,945.76

Step by Step Solution

1. Step 1: Write the proportion equation
   7,089.57 : 9,783.50 = 3,945.76 : x
2. Step 2: Convert to fraction form
   7,089.57/9,783.50 = 3,945.76/x
3. Step 3: Cross multiply
   7,089.57x = 9,783.50 × 3,945.76
4. Step 4: Simplify right side
   7,089.57x = 38,603,328.37
5. Step 5: Solve for x
   x = 38,603,328.37/7,089.57
6. Step 6: Final answer
   x = 5,445.09