Finding the Fourth Proportional to 71,280.48, 106,920.78 and 21,365.82

Step by Step Solution

1. Step 1: Write the proportion equation
   71,280.48 : 106,920.78 = 21,365.82 : x
2. Step 2: Convert to fraction form
   71,280.48/106,920.78 = 21,365.82/x
3. Step 3: Cross multiply
   71,280.48x = 106,920.78 × 21,365.82
4. Step 4: Simplify right side
   71,280.48x = 2,284,450,139.74
5. Step 5: Solve for x
   x = 2,284,450,139.74/71,280.48
6. Step 6: Final answer
   x = 32,048.75