Finding the Fourth Proportional to 45,510.54, 68,212.17 and 20,521.33

Step by Step Solution

1. Step 1: Write the proportion equation
   45,510.54 : 68,212.17 = 20,521.33 : x
2. Step 2: Convert to fraction form
   45,510.54/68,212.17 = 20,521.33/x
3. Step 3: Cross multiply
   45,510.54x = 68,212.17 × 20,521.33
4. Step 4: Simplify right side
   45,510.54x = 1,399,804,357.01
5. Step 5: Solve for x
   x = 1,399,804,357.01/45,510.54
6. Step 6: Final answer
   x = 30,757.81