Finding the Fourth Proportional to 85,676.43, 128,632.61 and 43,585.02

Step by Step Solution

1. Step 1: Write the proportion equation
   85,676.43 : 128,632.61 = 43,585.02 : x
2. Step 2: Convert to fraction form
   85,676.43/128,632.61 = 43,585.02/x
3. Step 3: Cross multiply
   85,676.43x = 128,632.61 × 43,585.02
4. Step 4: Simplify right side
   85,676.43x = 5,606,454,661.58
5. Step 5: Solve for x
   x = 5,606,454,661.58/85,676.43
6. Step 6: Final answer
   x = 65,437.54