Finding the Fourth Proportional to 33,072.53, 45,638.78 and 19,643.42

Step by Step Solution

1. Step 1: Write the proportion equation
   33,072.53 : 45,638.78 = 19,643.42 : x
2. Step 2: Convert to fraction form
   33,072.53/45,638.78 = 19,643.42/x
3. Step 3: Cross multiply
   33,072.53x = 45,638.78 × 19,643.42
4. Step 4: Simplify right side
   33,072.53x = 896,501,739.71
5. Step 5: Solve for x
   x = 896,501,739.71/33,072.53
6. Step 6: Final answer
   x = 27,107.15