Finding the Fourth Proportional to 3,988.93, 5,503.83 and 2,477.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,988.93 : 5,503.83 = 2,477.72 : x
2. Step 2: Convert to fraction form
   3,988.93/5,503.83 = 2,477.72/x
3. Step 3: Cross multiply
   3,988.93x = 5,503.83 × 2,477.72
4. Step 4: Simplify right side
   3,988.93x = 13,636,949.67
5. Step 5: Solve for x
   x = 13,636,949.67/3,988.93
6. Step 6: Final answer
   x = 3,418.70