Finding the Fourth Proportional to 3,518.50, 4,855.62 and 2,121.34

Step by Step Solution

1. Step 1: Write the proportion equation
   3,518.50 : 4,855.62 = 2,121.34 : x
2. Step 2: Convert to fraction form
   3,518.50/4,855.62 = 2,121.34/x
3. Step 3: Cross multiply
   3,518.50x = 4,855.62 × 2,121.34
4. Step 4: Simplify right side
   3,518.50x = 10,300,420.93
5. Step 5: Solve for x
   x = 10,300,420.93/3,518.50
6. Step 6: Final answer
   x = 2,927.50