Finding the Fourth Proportional to 105,104.32, 145,042.72 and 57,358.48

Step by Step Solution

1. Step 1: Write the proportion equation
   105,104.32 : 145,042.72 = 57,358.48 : x
2. Step 2: Convert to fraction form
   105,104.32/145,042.72 = 57,358.48/x
3. Step 3: Cross multiply
   105,104.32x = 145,042.72 × 57,358.48
4. Step 4: Simplify right side
   105,104.32x = 8,319,429,954.27
5. Step 5: Solve for x
   x = 8,319,429,954.27/105,104.32
6. Step 6: Final answer
   x = 79,154.02