Finding the Fourth Proportional to 53,917.69, 80,855.48 and 20,626.69

Step by Step Solution

1. Step 1: Write the proportion equation
   53,917.69 : 80,855.48 = 20,626.69 : x
2. Step 2: Convert to fraction form
   53,917.69/80,855.48 = 20,626.69/x
3. Step 3: Cross multiply
   53,917.69x = 80,855.48 × 20,626.69
4. Step 4: Simplify right side
   53,917.69x = 1,667,780,817.63
5. Step 5: Solve for x
   x = 1,667,780,817.63/53,917.69
6. Step 6: Final answer
   x = 30,931.98