Finding the Fourth Proportional to 105,039.17, 144,956.01 and 57,294.23

Step by Step Solution

1. Step 1: Write the proportion equation
   105,039.17 : 144,956.01 = 57,294.23 : x
2. Step 2: Convert to fraction form
   105,039.17/144,956.01 = 57,294.23/x
3. Step 3: Cross multiply
   105,039.17x = 144,956.01 × 57,294.23
4. Step 4: Simplify right side
   105,039.17x = 8,305,142,976.82
5. Step 5: Solve for x
   x = 8,305,142,976.82/105,039.17
6. Step 6: Final answer
   x = 79,067.10