Finding the Fourth Proportional to 2,216.47, 3,059.20 and 1,272.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,216.47 : 3,059.20 = 1,272.42 : x
2. Step 2: Convert to fraction form
   2,216.47/3,059.20 = 1,272.42/x
3. Step 3: Cross multiply
   2,216.47x = 3,059.20 × 1,272.42
4. Step 4: Simplify right side
   2,216.47x = 3,892,587.26
5. Step 5: Solve for x
   x = 3,892,587.26/2,216.47
6. Step 6: Final answer
   x = 1,756.21