Finding the Fourth Proportional to 105,022.82, 144,929.96 and 57,276.06

Step by Step Solution

1. Step 1: Write the proportion equation
   105,022.82 : 144,929.96 = 57,276.06 : x
2. Step 2: Convert to fraction form
   105,022.82/144,929.96 = 57,276.06/x
3. Step 3: Cross multiply
   105,022.82x = 144,929.96 × 57,276.06
4. Step 4: Simplify right side
   105,022.82x = 8,301,017,084.76
5. Step 5: Solve for x
   x = 8,301,017,084.76/105,022.82
6. Step 6: Final answer
   x = 79,040.13