Finding the Fourth Proportional to 85,383.72, 128,081.75 and 32,793.21

Step by Step Solution

1. Step 1: Write the proportion equation
   85,383.72 : 128,081.75 = 32,793.21 : x
2. Step 2: Convert to fraction form
   85,383.72/128,081.75 = 32,793.21/x
3. Step 3: Cross multiply
   85,383.72x = 128,081.75 × 32,793.21
4. Step 4: Simplify right side
   85,383.72x = 4,200,211,560.95
5. Step 5: Solve for x
   x = 4,200,211,560.95/85,383.72
6. Step 6: Final answer
   x = 49,192.18