Finding the Fourth Proportional to 33,220.42, 45,809.39 and 21,875.40

Step by Step Solution

1. Step 1: Write the proportion equation
   33,220.42 : 45,809.39 = 21,875.40 : x
2. Step 2: Convert to fraction form
   33,220.42/45,809.39 = 21,875.40/x
3. Step 3: Cross multiply
   33,220.42x = 45,809.39 × 21,875.40
4. Step 4: Simplify right side
   33,220.42x = 1,002,098,784.69
5. Step 5: Solve for x
   x = 1,002,098,784.69/33,220.42
6. Step 6: Final answer
   x = 30,165.15