Finding the Fourth Proportional to 2,148.72, 3,225.10 and 1,418.80

Step by Step Solution

1. Step 1: Write the proportion equation
   2,148.72 : 3,225.10 = 1,418.80 : x
2. Step 2: Convert to fraction form
   2,148.72/3,225.10 = 1,418.80/x
3. Step 3: Cross multiply
   2,148.72x = 3,225.10 × 1,418.80
4. Step 4: Simplify right side
   2,148.72x = 4,575,771.88
5. Step 5: Solve for x
   x = 4,575,771.88/2,148.72
6. Step 6: Final answer
   x = 2,129.53