Finding the Fourth Proportional to 105,292.55, 145,303.37 and 57,545.88

Step by Step Solution

1. Step 1: Write the proportion equation
   105,292.55 : 145,303.37 = 57,545.88 : x
2. Step 2: Convert to fraction form
   105,292.55/145,303.37 = 57,545.88/x
3. Step 3: Cross multiply
   105,292.55x = 145,303.37 × 57,545.88
4. Step 4: Simplify right side
   105,292.55x = 8,361,610,005.89
5. Step 5: Solve for x
   x = 8,361,610,005.89/105,292.55
6. Step 6: Final answer
   x = 79,413.12