Finding the Fourth Proportional to 13,923.58, 19,215.55 and 7,955.12

Step by Step Solution

1. Step 1: Write the proportion equation
   13,923.58 : 19,215.55 = 7,955.12 : x
2. Step 2: Convert to fraction form
   13,923.58/19,215.55 = 7,955.12/x
3. Step 3: Cross multiply
   13,923.58x = 19,215.55 × 7,955.12
4. Step 4: Simplify right side
   13,923.58x = 152,861,978.39
5. Step 5: Solve for x
   x = 152,861,978.39/13,923.58
6. Step 6: Final answer
   x = 10,978.64