Finding the Fourth Proportional to 85,991.72, 128,937.76 and 33,339.56

Step by Step Solution

1. Step 1: Write the proportion equation
   85,991.72 : 128,937.76 = 33,339.56 : x
2. Step 2: Convert to fraction form
   85,991.72/128,937.76 = 33,339.56/x
3. Step 3: Cross multiply
   85,991.72x = 128,937.76 × 33,339.56
4. Step 4: Simplify right side
   85,991.72x = 4,298,728,185.79
5. Step 5: Solve for x
   x = 4,298,728,185.79/85,991.72
6. Step 6: Final answer
   x = 49,990.02