Finding the Fourth Proportional to 53,460.72, 80,209.35 and 20,190.42

Step by Step Solution

1. Step 1: Write the proportion equation
   53,460.72 : 80,209.35 = 20,190.42 : x
2. Step 2: Convert to fraction form
   53,460.72/80,209.35 = 20,190.42/x
3. Step 3: Cross multiply
   53,460.72x = 80,209.35 × 20,190.42
4. Step 4: Simplify right side
   53,460.72x = 1,619,460,464.43
5. Step 5: Solve for x
   x = 1,619,460,464.43/53,460.72
6. Step 6: Final answer
   x = 30,292.53