Finding the Fourth Proportional to 105,030.72, 144,943.56 and 57,283.92

Step by Step Solution

1. Step 1: Write the proportion equation
   105,030.72 : 144,943.56 = 57,283.92 : x
2. Step 2: Convert to fraction form
   105,030.72/144,943.56 = 57,283.92/x
3. Step 3: Cross multiply
   105,030.72x = 144,943.56 × 57,283.92
4. Step 4: Simplify right side
   105,030.72x = 8,302,935,295.56
5. Step 5: Solve for x
   x = 8,302,935,295.56/105,030.72
6. Step 6: Final answer
   x = 79,052.45