Finding the Fourth Proportional to 90,085.50, 135,103.95 and 33,921.72

Step by Step Solution

1. Step 1: Write the proportion equation
   90,085.50 : 135,103.95 = 33,921.72 : x
2. Step 2: Convert to fraction form
   90,085.50/135,103.95 = 33,921.72/x
3. Step 3: Cross multiply
   90,085.50x = 135,103.95 × 33,921.72
4. Step 4: Simplify right side
   90,085.50x = 4,582,958,362.79
5. Step 5: Solve for x
   x = 4,582,958,362.79/90,085.50
6. Step 6: Final answer
   x = 50,873.43