Finding the Fourth Proportional to 105,003.36, 144,878.76 and 64,157.04

Step by Step Solution

1. Step 1: Write the proportion equation
   105,003.36 : 144,878.76 = 64,157.04 : x
2. Step 2: Convert to fraction form
   105,003.36/144,878.76 = 64,157.04/x
3. Step 3: Cross multiply
   105,003.36x = 144,878.76 × 64,157.04
4. Step 4: Simplify right side
   105,003.36x = 9,294,992,400.47
5. Step 5: Solve for x
   x = 9,294,992,400.47/105,003.36
6. Step 6: Final answer
   x = 88,520.90