Finding the Fourth Proportional to 53,406.72, 80,109.20 and 21,809.84

Step by Step Solution

1. Step 1: Write the proportion equation
   53,406.72 : 80,109.20 = 21,809.84 : x
2. Step 2: Convert to fraction form
   53,406.72/80,109.20 = 21,809.84/x
3. Step 3: Cross multiply
   53,406.72x = 80,109.20 × 21,809.84
4. Step 4: Simplify right side
   53,406.72x = 1,747,168,488.51
5. Step 5: Solve for x
   x = 1,747,168,488.51/53,406.72
6. Step 6: Final answer
   x = 32,714.39