Finding the Fourth Proportional to 33,340.89, 45,936.59 and 21,990.36

Step by Step Solution

1. Step 1: Write the proportion equation
   33,340.89 : 45,936.59 = 21,990.36 : x
2. Step 2: Convert to fraction form
   33,340.89/45,936.59 = 21,990.36/x
3. Step 3: Cross multiply
   33,340.89x = 45,936.59 × 21,990.36
4. Step 4: Simplify right side
   33,340.89x = 1,010,162,041.32
5. Step 5: Solve for x
   x = 1,010,162,041.32/33,340.89
6. Step 6: Final answer
   x = 30,297.99