Finding the Fourth Proportional to 1,889.55, 2,607.14 and 1,216.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,889.55 : 2,607.14 = 1,216.15 : x
2. Step 2: Convert to fraction form
   1,889.55/2,607.14 = 1,216.15/x
3. Step 3: Cross multiply
   1,889.55x = 2,607.14 × 1,216.15
4. Step 4: Simplify right side
   1,889.55x = 3,170,669.83
5. Step 5: Solve for x
   x = 3,170,669.83/1,889.55
6. Step 6: Final answer
   x = 1,678.00