Finding the Fourth Proportional to 105,453.48, 145,525.81 and 57,706.83

Step by Step Solution

1. Step 1: Write the proportion equation
   105,453.48 : 145,525.81 = 57,706.83 : x
2. Step 2: Convert to fraction form
   105,453.48/145,525.81 = 57,706.83/x
3. Step 3: Cross multiply
   105,453.48x = 145,525.81 × 57,706.83
4. Step 4: Simplify right side
   105,453.48x = 8,397,833,178.28
5. Step 5: Solve for x
   x = 8,397,833,178.28/105,453.48
6. Step 6: Final answer
   x = 79,635.43