Finding the Fourth Proportional to 105,272.96, 145,280.27 and 57,529.38

Step by Step Solution

1. Step 1: Write the proportion equation
   105,272.96 : 145,280.27 = 57,529.38 : x
2. Step 2: Convert to fraction form
   105,272.96/145,280.27 = 57,529.38/x
3. Step 3: Cross multiply
   105,272.96x = 145,280.27 × 57,529.38
4. Step 4: Simplify right side
   105,272.96x = 8,357,883,571.69
5. Step 5: Solve for x
   x = 8,357,883,571.69/105,272.96
6. Step 6: Final answer
   x = 79,392.50