Finding the Fourth Proportional to 3,888.86, 5,808.50 and 3,518.09

Step by Step Solution

1. Step 1: Write the proportion equation
   3,888.86 : 5,808.50 = 3,518.09 : x
2. Step 2: Convert to fraction form
   3,888.86/5,808.50 = 3,518.09/x
3. Step 3: Cross multiply
   3,888.86x = 5,808.50 × 3,518.09
4. Step 4: Simplify right side
   3,888.86x = 20,434,822.70
5. Step 5: Solve for x
   x = 20,434,822.70/3,888.86
6. Step 6: Final answer
   x = 5,254.71