Finding the Fourth Proportional to 53,411.99, 80,136.47 and 20,141.60

Step by Step Solution

1. Step 1: Write the proportion equation
   53,411.99 : 80,136.47 = 20,141.60 : x
2. Step 2: Convert to fraction form
   53,411.99/80,136.47 = 20,141.60/x
3. Step 3: Cross multiply
   53,411.99x = 80,136.47 × 20,141.60
4. Step 4: Simplify right side
   53,411.99x = 1,614,076,373.82
5. Step 5: Solve for x
   x = 1,614,076,373.82/53,411.99
6. Step 6: Final answer
   x = 30,219.37