Finding the Fourth Proportional to 33,840, 46,692.72 and 21,901.68

Step by Step Solution

1. Step 1: Write the proportion equation
   33,840 : 46,692.72 = 21,901.68 : x
2. Step 2: Convert to fraction form
   33,840/46,692.72 = 21,901.68/x
3. Step 3: Cross multiply
   33,840x = 46,692.72 × 21,901.68
4. Step 4: Simplify right side
   33,840x = 1,022,649,011.77
5. Step 5: Solve for x
   x = 1,022,649,011.77/33,840
6. Step 6: Final answer
   x = 30,220.12