Finding the Fourth Proportional to 53,407.28, 80,111.10 and 20,118.41

Step by Step Solution

1. Step 1: Write the proportion equation
   53,407.28 : 80,111.10 = 20,118.41 : x
2. Step 2: Convert to fraction form
   53,407.28/80,111.10 = 20,118.41/x
3. Step 3: Cross multiply
   53,407.28x = 80,111.10 × 20,118.41
4. Step 4: Simplify right side
   53,407.28x = 1,611,707,854.76
5. Step 5: Solve for x
   x = 1,611,707,854.76/53,407.28
6. Step 6: Final answer
   x = 30,177.68