Finding the Fourth Proportional to 53,081.46, 79,624.98 and 13,638.84

Step by Step Solution

1. Step 1: Write the proportion equation
   53,081.46 : 79,624.98 = 13,638.84 : x
2. Step 2: Convert to fraction form
   53,081.46/79,624.98 = 13,638.84/x
3. Step 3: Cross multiply
   53,081.46x = 79,624.98 × 13,638.84
4. Step 4: Simplify right side
   53,081.46x = 1,085,992,362.22
5. Step 5: Solve for x
   x = 1,085,992,362.22/53,081.46
6. Step 6: Final answer
   x = 20,458.98