Finding the Fourth Proportional to 13,855.50, 20,770.56 and 5,083.74

Step by Step Solution

1. Step 1: Write the proportion equation
   13,855.50 : 20,770.56 = 5,083.74 : x
2. Step 2: Convert to fraction form
   13,855.50/20,770.56 = 5,083.74/x
3. Step 3: Cross multiply
   13,855.50x = 20,770.56 × 5,083.74
4. Step 4: Simplify right side
   13,855.50x = 105,592,126.69
5. Step 5: Solve for x
   x = 105,592,126.69/13,855.50
6. Step 6: Final answer
   x = 7,620.95