Finding the Fourth Proportional to 105,081.21, 145,012.05 and 67,355.46

Step by Step Solution

1. Step 1: Write the proportion equation
   105,081.21 : 145,012.05 = 67,355.46 : x
2. Step 2: Convert to fraction form
   105,081.21/145,012.05 = 67,355.46/x
3. Step 3: Cross multiply
   105,081.21x = 145,012.05 × 67,355.46
4. Step 4: Simplify right side
   105,081.21x = 9,767,353,333.29
5. Step 5: Solve for x
   x = 9,767,353,333.29/105,081.21
6. Step 6: Final answer
   x = 92,950.52