Finding the Fourth Proportional to 105,039.18, 144,956.02 and 57,294.24

Step by Step Solution

1. Step 1: Write the proportion equation
   105,039.18 : 144,956.02 = 57,294.24 : x
2. Step 2: Convert to fraction form
   105,039.18/144,956.02 = 57,294.24/x
3. Step 3: Cross multiply
   105,039.18x = 144,956.02 × 57,294.24
4. Step 4: Simplify right side
   105,039.18x = 8,305,144,999.32
5. Step 5: Solve for x
   x = 8,305,144,999.32/105,039.18
6. Step 6: Final answer
   x = 79,067.12