Finding the Fourth Proportional to 105,452.76, 145,524.82 and 57,706.12

Step by Step Solution

1. Step 1: Write the proportion equation
   105,452.76 : 145,524.82 = 57,706.12 : x
2. Step 2: Convert to fraction form
   105,452.76/145,524.82 = 57,706.12/x
3. Step 3: Cross multiply
   105,452.76x = 145,524.82 × 57,706.12
4. Step 4: Simplify right side
   105,452.76x = 8,397,671,998.27
5. Step 5: Solve for x
   x = 8,397,671,998.27/105,452.76
6. Step 6: Final answer
   x = 79,634.44