Finding the Fourth Proportional to 85,517.87, 128,300.31 and 35,621.33

Step by Step Solution

1. Step 1: Write the proportion equation
   85,517.87 : 128,300.31 = 35,621.33 : x
2. Step 2: Convert to fraction form
   85,517.87/128,300.31 = 35,621.33/x
3. Step 3: Cross multiply
   85,517.87x = 128,300.31 × 35,621.33
4. Step 4: Simplify right side
   85,517.87x = 4,570,227,040.11
5. Step 5: Solve for x
   x = 4,570,227,040.11/85,517.87
6. Step 6: Final answer
   x = 53,441.78