Finding the Fourth Proportional to 105,474.27, 145,553.97 and 57,076.17

Step by Step Solution

1. Step 1: Write the proportion equation
   105,474.27 : 145,553.97 = 57,076.17 : x
2. Step 2: Convert to fraction form
   105,474.27/145,553.97 = 57,076.17/x
3. Step 3: Cross multiply
   105,474.27x = 145,553.97 × 57,076.17
4. Step 4: Simplify right side
   105,474.27x = 8,307,662,804.10
5. Step 5: Solve for x
   x = 8,307,662,804.10/105,474.27
6. Step 6: Final answer
   x = 78,764.83