Finding the Fourth Proportional to 105,524.45, 145,623.71 and 57,777.78

Step by Step Solution

1. Step 1: Write the proportion equation
   105,524.45 : 145,623.71 = 57,777.78 : x
2. Step 2: Convert to fraction form
   105,524.45/145,623.71 = 57,777.78/x
3. Step 3: Cross multiply
   105,524.45x = 145,623.71 × 57,777.78
4. Step 4: Simplify right side
   105,524.45x = 8,413,814,390.27
5. Step 5: Solve for x
   x = 8,413,814,390.27/105,524.45
6. Step 6: Final answer
   x = 79,733.32