Finding the Fourth Proportional to 53,498.15, 80,216.85 and 20,219.30

Step by Step Solution

1. Step 1: Write the proportion equation
   53,498.15 : 80,216.85 = 20,219.30 : x
2. Step 2: Convert to fraction form
   53,498.15/80,216.85 = 20,219.30/x
3. Step 3: Cross multiply
   53,498.15x = 80,216.85 × 20,219.30
4. Step 4: Simplify right side
   53,498.15x = 1,621,928,555.21
5. Step 5: Solve for x
   x = 1,621,928,555.21/53,498.15
6. Step 6: Final answer
   x = 30,317.47