Finding the Fourth Proportional to 105,355.89, 157,795.29 and 81,495.72

Step by Step Solution

1. Step 1: Write the proportion equation
   105,355.89 : 157,795.29 = 81,495.72 : x
2. Step 2: Convert to fraction form
   105,355.89/157,795.29 = 81,495.72/x
3. Step 3: Cross multiply
   105,355.89x = 157,795.29 × 81,495.72
4. Step 4: Simplify right side
   105,355.89x = 12,859,640,771.16
5. Step 5: Solve for x
   x = 12,859,640,771.16/105,355.89
6. Step 6: Final answer
   x = 122,059.06