Finding the Fourth Proportional to 105,022.37, 144,931.41 and 57,274.70

Step by Step Solution

1. Step 1: Write the proportion equation
   105,022.37 : 144,931.41 = 57,274.70 : x
2. Step 2: Convert to fraction form
   105,022.37/144,931.41 = 57,274.70/x
3. Step 3: Cross multiply
   105,022.37x = 144,931.41 × 57,274.70
4. Step 4: Simplify right side
   105,022.37x = 8,300,902,303.67
5. Step 5: Solve for x
   x = 8,300,902,303.67/105,022.37
6. Step 6: Final answer
   x = 79,039.37