Finding the Fourth Proportional to 105,620.15, 145,752.41 and 57,872.48

Step by Step Solution

1. Step 1: Write the proportion equation
   105,620.15 : 145,752.41 = 57,872.48 : x
2. Step 2: Convert to fraction form
   105,620.15/145,752.41 = 57,872.48/x
3. Step 3: Cross multiply
   105,620.15x = 145,752.41 × 57,872.48
4. Step 4: Simplify right side
   105,620.15x = 8,435,052,848.60
5. Step 5: Solve for x
   x = 8,435,052,848.60/105,620.15
6. Step 6: Final answer
   x = 79,862.15