Finding the Fourth Proportional to 7,323.18, 10,978.27 and 2,642.09

Step by Step Solution

1. Step 1: Write the proportion equation
   7,323.18 : 10,978.27 = 2,642.09 : x
2. Step 2: Convert to fraction form
   7,323.18/10,978.27 = 2,642.09/x
3. Step 3: Cross multiply
   7,323.18x = 10,978.27 × 2,642.09
4. Step 4: Simplify right side
   7,323.18x = 29,005,515.89
5. Step 5: Solve for x
   x = 29,005,515.89/7,323.18
6. Step 6: Final answer
   x = 3,960.78