Finding the Fourth Proportional to 105,020.82, 144,927.20 and 57,274.06

Step by Step Solution

1. Step 1: Write the proportion equation
   105,020.82 : 144,927.20 = 57,274.06 : x
2. Step 2: Convert to fraction form
   105,020.82/144,927.20 = 57,274.06/x
3. Step 3: Cross multiply
   105,020.82x = 144,927.20 × 57,274.06
4. Step 4: Simplify right side
   105,020.82x = 8,300,569,148.43
5. Step 5: Solve for x
   x = 8,300,569,148.43/105,020.82
6. Step 6: Final answer
   x = 79,037.37