Finding the Fourth Proportional to 85,819.56, 128,696.94 and 41,431.56

Step by Step Solution

1. Step 1: Write the proportion equation
   85,819.56 : 128,696.94 = 41,431.56 : x
2. Step 2: Convert to fraction form
   85,819.56/128,696.94 = 41,431.56/x
3. Step 3: Cross multiply
   85,819.56x = 128,696.94 × 41,431.56
4. Step 4: Simplify right side
   85,819.56x = 5,332,114,991.43
5. Step 5: Solve for x
   x = 5,332,114,991.43/85,819.56
6. Step 6: Final answer
   x = 62,131.70