Finding the Fourth Proportional to 85,433.10, 128,151.68 and 26,269.31

Step by Step Solution

1. Step 1: Write the proportion equation
   85,433.10 : 128,151.68 = 26,269.31 : x
2. Step 2: Convert to fraction form
   85,433.10/128,151.68 = 26,269.31/x
3. Step 3: Cross multiply
   85,433.10x = 128,151.68 × 26,269.31
4. Step 4: Simplify right side
   85,433.10x = 3,366,456,208.94
5. Step 5: Solve for x
   x = 3,366,456,208.94/85,433.10
6. Step 6: Final answer
   x = 39,404.59