Finding the Fourth Proportional to 137,760.33, 190,086.69 and 81,164.01

Step by Step Solution

1. Step 1: Write the proportion equation
   137,760.33 : 190,086.69 = 81,164.01 : x
2. Step 2: Convert to fraction form
   137,760.33/190,086.69 = 81,164.01/x
3. Step 3: Cross multiply
   137,760.33x = 190,086.69 × 81,164.01
4. Step 4: Simplify right side
   137,760.33x = 15,428,198,008.03
5. Step 5: Solve for x
   x = 15,428,198,008.03/137,760.33
6. Step 6: Final answer
   x = 111,993.04