Finding the Fourth Proportional to 105,390.42, 158,053.71 and 55,442.97

Step by Step Solution

1. Step 1: Write the proportion equation
   105,390.42 : 158,053.71 = 55,442.97 : x
2. Step 2: Convert to fraction form
   105,390.42/158,053.71 = 55,442.97/x
3. Step 3: Cross multiply
   105,390.42x = 158,053.71 × 55,442.97
4. Step 4: Simplify right side
   105,390.42x = 8,762,967,101.92
5. Step 5: Solve for x
   x = 8,762,967,101.92/105,390.42
6. Step 6: Final answer
   x = 83,147.66