Finding the Fourth Proportional to 85,793.34, 128,654.37 and 33,172.50

Step by Step Solution

1. Step 1: Write the proportion equation
   85,793.34 : 128,654.37 = 33,172.50 : x
2. Step 2: Convert to fraction form
   85,793.34/128,654.37 = 33,172.50/x
3. Step 3: Cross multiply
   85,793.34x = 128,654.37 × 33,172.50
4. Step 4: Simplify right side
   85,793.34x = 4,267,787,088.83
5. Step 5: Solve for x
   x = 4,267,787,088.83/85,793.34
6. Step 6: Final answer
   x = 49,744.97