Finding the Fourth Proportional to 105,620.69, 145,755.72 and 57,873.92

Step by Step Solution

1. Step 1: Write the proportion equation
   105,620.69 : 145,755.72 = 57,873.92 : x
2. Step 2: Convert to fraction form
   105,620.69/145,755.72 = 57,873.92/x
3. Step 3: Cross multiply
   105,620.69x = 145,755.72 × 57,873.92
4. Step 4: Simplify right side
   105,620.69x = 8,435,454,150.04
5. Step 5: Solve for x
   x = 8,435,454,150.04/105,620.69
6. Step 6: Final answer
   x = 79,865.54