Finding the Fourth Proportional to 105,581.21, 158,395.16 and 58,171.88

Step by Step Solution

1. Step 1: Write the proportion equation
   105,581.21 : 158,395.16 = 58,171.88 : x
2. Step 2: Convert to fraction form
   105,581.21/158,395.16 = 58,171.88/x
3. Step 3: Cross multiply
   105,581.21x = 158,395.16 × 58,171.88
4. Step 4: Simplify right side
   105,581.21x = 9,214,144,240.10
5. Step 5: Solve for x
   x = 9,214,144,240.10/105,581.21
6. Step 6: Final answer
   x = 87,270.68