Finding the Fourth Proportional to 105,089.84, 145,022.04 and 57,341.96

Step by Step Solution

1. Step 1: Write the proportion equation
   105,089.84 : 145,022.04 = 57,341.96 : x
2. Step 2: Convert to fraction form
   105,089.84/145,022.04 = 57,341.96/x
3. Step 3: Cross multiply
   105,089.84x = 145,022.04 × 57,341.96
4. Step 4: Simplify right side
   105,089.84x = 8,315,848,016.80
5. Step 5: Solve for x
   x = 8,315,848,016.80/105,089.84
6. Step 6: Final answer
   x = 79,130.85