Finding the Fourth Proportional to 105,514.84, 145,609.41 and 57,767.77

Step by Step Solution

1. Step 1: Write the proportion equation
   105,514.84 : 145,609.41 = 57,767.77 : x
2. Step 2: Convert to fraction form
   105,514.84/145,609.41 = 57,767.77/x
3. Step 3: Cross multiply
   105,514.84x = 145,609.41 × 57,767.77
4. Step 4: Simplify right side
   105,514.84x = 8,411,530,906.72
5. Step 5: Solve for x
   x = 8,411,530,906.72/105,514.84
6. Step 6: Final answer
   x = 79,718.94