Finding the Fourth Proportional to 105,443.79, 145,512.43 and 57,697.14

Step by Step Solution

1. Step 1: Write the proportion equation
   105,443.79 : 145,512.43 = 57,697.14 : x
2. Step 2: Convert to fraction form
   105,443.79/145,512.43 = 57,697.14/x
3. Step 3: Cross multiply
   105,443.79x = 145,512.43 × 57,697.14
4. Step 4: Simplify right side
   105,443.79x = 8,395,650,628.37
5. Step 5: Solve for x
   x = 8,395,650,628.37/105,443.79
6. Step 6: Final answer
   x = 79,622.05