Finding the Fourth Proportional to 85,395.59, 128,171.51 and 43,304.73

Step by Step Solution

1. Step 1: Write the proportion equation
   85,395.59 : 128,171.51 = 43,304.73 : x
2. Step 2: Convert to fraction form
   85,395.59/128,171.51 = 43,304.73/x
3. Step 3: Cross multiply
   85,395.59x = 128,171.51 × 43,304.73
4. Step 4: Simplify right side
   85,395.59x = 5,550,431,993.38
5. Step 5: Solve for x
   x = 5,550,431,993.38/85,395.59
6. Step 6: Final answer
   x = 64,996.71