Finding the Fourth Proportional to 2,216.54, 3,056.98 and 1,331.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,216.54 : 3,056.98 = 1,331.72 : x
2. Step 2: Convert to fraction form
   2,216.54/3,056.98 = 1,331.72/x
3. Step 3: Cross multiply
   2,216.54x = 3,056.98 × 1,331.72
4. Step 4: Simplify right side
   2,216.54x = 4,071,041.41
5. Step 5: Solve for x
   x = 4,071,041.41/2,216.54
6. Step 6: Final answer
   x = 1,836.66