Finding the Fourth Proportional to 124,105.16, 171,301.20 and 81,090.96

Step by Step Solution

1. Step 1: Write the proportion equation
   124,105.16 : 171,301.20 = 81,090.96 : x
2. Step 2: Convert to fraction form
   124,105.16/171,301.20 = 81,090.96/x
3. Step 3: Cross multiply
   124,105.16x = 171,301.20 × 81,090.96
4. Step 4: Simplify right side
   124,105.16x = 13,890,977,810.68
5. Step 5: Solve for x
   x = 13,890,977,810.68/124,105.16
6. Step 6: Final answer
   x = 111,929.09