Finding the Fourth Proportional to 3,988.33, 5,503.83 and 2,219.89

Step by Step Solution

1. Step 1: Write the proportion equation
   3,988.33 : 5,503.83 = 2,219.89 : x
2. Step 2: Convert to fraction form
   3,988.33/5,503.83 = 2,219.89/x
3. Step 3: Cross multiply
   3,988.33x = 5,503.83 × 2,219.89
4. Step 4: Simplify right side
   3,988.33x = 12,217,897.18
5. Step 5: Solve for x
   x = 12,217,897.18/3,988.33
6. Step 6: Final answer
   x = 3,063.41