Finding the Fourth Proportional to 105,651.61, 145,792.61 and 57,901.57

Step by Step Solution

1. Step 1: Write the proportion equation
   105,651.61 : 145,792.61 = 57,901.57 : x
2. Step 2: Convert to fraction form
   105,651.61/145,792.61 = 57,901.57/x
3. Step 3: Cross multiply
   105,651.61x = 145,792.61 × 57,901.57
4. Step 4: Simplify right side
   105,651.61x = 8,441,620,576.54
5. Step 5: Solve for x
   x = 8,441,620,576.54/105,651.61
6. Step 6: Final answer
   x = 79,900.54