Finding the Fourth Proportional to 105,620.25, 145,755.96 and 57,875.49

Step by Step Solution

1. Step 1: Write the proportion equation
   105,620.25 : 145,755.96 = 57,875.49 : x
2. Step 2: Convert to fraction form
   105,620.25/145,755.96 = 57,875.49/x
3. Step 3: Cross multiply
   105,620.25x = 145,755.96 × 57,875.49
4. Step 4: Simplify right side
   105,620.25x = 8,435,697,605.42
5. Step 5: Solve for x
   x = 8,435,697,605.42/105,620.25
6. Step 6: Final answer
   x = 79,868.18