Finding the Fourth Proportional to 105,025.16, 144,938.24 and 57,281.12

Step by Step Solution

1. Step 1: Write the proportion equation
   105,025.16 : 144,938.24 = 57,281.12 : x
2. Step 2: Convert to fraction form
   105,025.16/144,938.24 = 57,281.12/x
3. Step 3: Cross multiply
   105,025.16x = 144,938.24 × 57,281.12
4. Step 4: Simplify right side
   105,025.16x = 8,302,224,718.03
5. Step 5: Solve for x
   x = 8,302,224,718.03/105,025.16
6. Step 6: Final answer
   x = 79,049.86