Finding the Fourth Proportional to 7,674.73, 11,518.37 and 3,978.07

Step by Step Solution

1. Step 1: Write the proportion equation
   7,674.73 : 11,518.37 = 3,978.07 : x
2. Step 2: Convert to fraction form
   7,674.73/11,518.37 = 3,978.07/x
3. Step 3: Cross multiply
   7,674.73x = 11,518.37 × 3,978.07
4. Step 4: Simplify right side
   7,674.73x = 45,820,882.15
5. Step 5: Solve for x
   x = 45,820,882.15/7,674.73
6. Step 6: Final answer
   x = 5,970.36