Finding the Fourth Proportional to 116,940.63, 161,451.86 and 81,118.11

Step by Step Solution

1. Step 1: Write the proportion equation
   116,940.63 : 161,451.86 = 81,118.11 : x
2. Step 2: Convert to fraction form
   116,940.63/161,451.86 = 81,118.11/x
3. Step 3: Cross multiply
   116,940.63x = 161,451.86 × 81,118.11
4. Step 4: Simplify right side
   116,940.63x = 13,096,669,333.59
5. Step 5: Solve for x
   x = 13,096,669,333.59/116,940.63
6. Step 6: Final answer
   x = 111,994.17