Finding the Fourth Proportional to 105,065.36, 144,964.32 and 64,219.04

Step by Step Solution

1. Step 1: Write the proportion equation
   105,065.36 : 144,964.32 = 64,219.04 : x
2. Step 2: Convert to fraction form
   105,065.36/144,964.32 = 64,219.04/x
3. Step 3: Cross multiply
   105,065.36x = 144,964.32 × 64,219.04
4. Step 4: Simplify right side
   105,065.36x = 9,309,469,464.65
5. Step 5: Solve for x
   x = 9,309,469,464.65/105,065.36
6. Step 6: Final answer
   x = 88,606.46