Finding the Fourth Proportional to 85,919.25, 128,706.42 and 43,797.63

Step by Step Solution

1. Step 1: Write the proportion equation
   85,919.25 : 128,706.42 = 43,797.63 : x
2. Step 2: Convert to fraction form
   85,919.25/128,706.42 = 43,797.63/x
3. Step 3: Cross multiply
   85,919.25x = 128,706.42 × 43,797.63
4. Step 4: Simplify right side
   85,919.25x = 5,637,036,161.78
5. Step 5: Solve for x
   x = 5,637,036,161.78/85,919.25
6. Step 6: Final answer
   x = 65,608.54