Finding the Fourth Proportional to 85,760.80, 128,364.72 and 44,150.56

Step by Step Solution

1. Step 1: Write the proportion equation
   85,760.80 : 128,364.72 = 44,150.56 : x
2. Step 2: Convert to fraction form
   85,760.80/128,364.72 = 44,150.56/x
3. Step 3: Cross multiply
   85,760.80x = 128,364.72 × 44,150.56
4. Step 4: Simplify right side
   85,760.80x = 5,667,374,272.24
5. Step 5: Solve for x
   x = 5,667,374,272.24/85,760.80
6. Step 6: Final answer
   x = 66,083.51