Finding the Fourth Proportional to 85,696.89, 128,496.02 and 33,099.45

Step by Step Solution

1. Step 1: Write the proportion equation
   85,696.89 : 128,496.02 = 33,099.45 : x
2. Step 2: Convert to fraction form
   85,696.89/128,496.02 = 33,099.45/x
3. Step 3: Cross multiply
   85,696.89x = 128,496.02 × 33,099.45
4. Step 4: Simplify right side
   85,696.89x = 4,253,147,423.69
5. Step 5: Solve for x
   x = 4,253,147,423.69/85,696.89
6. Step 6: Final answer
   x = 49,630.13