Finding the Fourth Proportional to 53,514.79, 80,288.38 and 20,245.05

Step by Step Solution

1. Step 1: Write the proportion equation
   53,514.79 : 80,288.38 = 20,245.05 : x
2. Step 2: Convert to fraction form
   53,514.79/80,288.38 = 20,245.05/x
3. Step 3: Cross multiply
   53,514.79x = 80,288.38 × 20,245.05
4. Step 4: Simplify right side
   53,514.79x = 1,625,442,216.91
5. Step 5: Solve for x
   x = 1,625,442,216.91/53,514.79
6. Step 6: Final answer
   x = 30,373.70