Finding the Fourth Proportional to 105,815.62, 146,025.24 and 57,417.34

Step by Step Solution

1. Step 1: Write the proportion equation
   105,815.62 : 146,025.24 = 57,417.34 : x
2. Step 2: Convert to fraction form
   105,815.62/146,025.24 = 57,417.34/x
3. Step 3: Cross multiply
   105,815.62x = 146,025.24 × 57,417.34
4. Step 4: Simplify right side
   105,815.62x = 8,384,380,853.66
5. Step 5: Solve for x
   x = 8,384,380,853.66/105,815.62
6. Step 6: Final answer
   x = 79,235.76