Finding the Fourth Proportional to 104,872.69, 144,720.22 and 64,105.07

Step by Step Solution

1. Step 1: Write the proportion equation
   104,872.69 : 144,720.22 = 64,105.07 : x
2. Step 2: Convert to fraction form
   104,872.69/144,720.22 = 64,105.07/x
3. Step 3: Cross multiply
   104,872.69x = 144,720.22 × 64,105.07
4. Step 4: Simplify right side
   104,872.69x = 9,277,300,004.10
5. Step 5: Solve for x
   x = 9,277,300,004.10/104,872.69
6. Step 6: Final answer
   x = 88,462.50