Finding the Fourth Proportional to 105,317.34, 145,243.83 and 87,383.94

Step by Step Solution

1. Step 1: Write the proportion equation
   105,317.34 : 145,243.83 = 87,383.94 : x
2. Step 2: Convert to fraction form
   105,317.34/145,243.83 = 87,383.94/x
3. Step 3: Cross multiply
   105,317.34x = 145,243.83 × 87,383.94
4. Step 4: Simplify right side
   105,317.34x = 12,691,978,126.09
5. Step 5: Solve for x
   x = 12,691,978,126.09/105,317.34
6. Step 6: Final answer
   x = 120,511.76