Finding the Fourth Proportional to 105,679.47, 145,836.61 and 57,933.62

Step by Step Solution

1. Step 1: Write the proportion equation
   105,679.47 : 145,836.61 = 57,933.62 : x
2. Step 2: Convert to fraction form
   105,679.47/145,836.61 = 57,933.62/x
3. Step 3: Cross multiply
   105,679.47x = 145,836.61 × 57,933.62
4. Step 4: Simplify right side
   105,679.47x = 8,448,842,745.83
5. Step 5: Solve for x
   x = 8,448,842,745.83/105,679.47
6. Step 6: Final answer
   x = 79,947.82