Finding the Fourth Proportional to 105,817.03, 158,665.39 and 81,792.83

Step by Step Solution

1. Step 1: Write the proportion equation
   105,817.03 : 158,665.39 = 81,792.83 : x
2. Step 2: Convert to fraction form
   105,817.03/158,665.39 = 81,792.83/x
3. Step 3: Cross multiply
   105,817.03x = 158,665.39 × 81,792.83
4. Step 4: Simplify right side
   105,817.03x = 12,977,691,271.15
5. Step 5: Solve for x
   x = 12,977,691,271.15/105,817.03
6. Step 6: Final answer
   x = 122,642.75