Finding the Fourth Proportional to 105,681.55, 145,849.74 and 57,944

Step by Step Solution

1. Step 1: Write the proportion equation
   105,681.55 : 145,849.74 = 57,944 : x
2. Step 2: Convert to fraction form
   105,681.55/145,849.74 = 57,944/x
3. Step 3: Cross multiply
   105,681.55x = 145,849.74 × 57,944
4. Step 4: Simplify right side
   105,681.55x = 8,451,117,334.56
5. Step 5: Solve for x
   x = 8,451,117,334.56/105,681.55
6. Step 6: Final answer
   x = 79,967.76