Finding the Fourth Proportional to 105,073.98, 145,002.57 and 57,328.38

Step by Step Solution

1. Step 1: Write the proportion equation
   105,073.98 : 145,002.57 = 57,328.38 : x
2. Step 2: Convert to fraction form
   105,073.98/145,002.57 = 57,328.38/x
3. Step 3: Cross multiply
   105,073.98x = 145,002.57 × 57,328.38
4. Step 4: Simplify right side
   105,073.98x = 8,312,762,433.94
5. Step 5: Solve for x
   x = 8,312,762,433.94/105,073.98
6. Step 6: Final answer
   x = 79,113.42