Finding the Fourth Proportional to 7,048.72, 10,574.84 and 2,118.40

Step by Step Solution

1. Step 1: Write the proportion equation
   7,048.72 : 10,574.84 = 2,118.40 : x
2. Step 2: Convert to fraction form
   7,048.72/10,574.84 = 2,118.40/x
3. Step 3: Cross multiply
   7,048.72x = 10,574.84 × 2,118.40
4. Step 4: Simplify right side
   7,048.72x = 22,401,741.06
5. Step 5: Solve for x
   x = 22,401,741.06/7,048.72
6. Step 6: Final answer
   x = 3,178.13