Finding the Fourth Proportional to 53,436.52, 80,139.12 and 20,132.56

Step by Step Solution

1. Step 1: Write the proportion equation
   53,436.52 : 80,139.12 = 20,132.56 : x
2. Step 2: Convert to fraction form
   53,436.52/80,139.12 = 20,132.56/x
3. Step 3: Cross multiply
   53,436.52x = 80,139.12 × 20,132.56
4. Step 4: Simplify right side
   53,436.52x = 1,613,405,641.75
5. Step 5: Solve for x
   x = 1,613,405,641.75/53,436.52
6. Step 6: Final answer
   x = 30,192.94