Finding the Fourth Proportional to 111,755.49, 167,743.40 and 82,090.05

Step by Step Solution

1. Step 1: Write the proportion equation
   111,755.49 : 167,743.40 = 82,090.05 : x
2. Step 2: Convert to fraction form
   111,755.49/167,743.40 = 82,090.05/x
3. Step 3: Cross multiply
   111,755.49x = 167,743.40 × 82,090.05
4. Step 4: Simplify right side
   111,755.49x = 13,770,063,682.72
5. Step 5: Solve for x
   x = 13,770,063,682.72/111,755.49
6. Step 6: Final answer
   x = 123,215.99