Finding the Fourth Proportional to 53,680.94, 80,530.72 and 18,142.56

Step by Step Solution

1. Step 1: Write the proportion equation
   53,680.94 : 80,530.72 = 18,142.56 : x
2. Step 2: Convert to fraction form
   53,680.94/80,530.72 = 18,142.56/x
3. Step 3: Cross multiply
   53,680.94x = 80,530.72 × 18,142.56
4. Step 4: Simplify right side
   53,680.94x = 1,461,033,419.44
5. Step 5: Solve for x
   x = 1,461,033,419.44/53,680.94
6. Step 6: Final answer
   x = 27,216.99