Finding the Fourth Proportional to 53,685.98, 80,503.01 and 19,928.72

Step by Step Solution

1. Step 1: Write the proportion equation
   53,685.98 : 80,503.01 = 19,928.72 : x
2. Step 2: Convert to fraction form
   53,685.98/80,503.01 = 19,928.72/x
3. Step 3: Cross multiply
   53,685.98x = 80,503.01 × 19,928.72
4. Step 4: Simplify right side
   53,685.98x = 1,604,321,443.29
5. Step 5: Solve for x
   x = 1,604,321,443.29/53,685.98
6. Step 6: Final answer
   x = 29,883.44