Finding the Fourth Proportional to 1,807.37, 2,496.21 and 1,216.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,807.37 : 2,496.21 = 1,216.88 : x
2. Step 2: Convert to fraction form
   1,807.37/2,496.21 = 1,216.88/x
3. Step 3: Cross multiply
   1,807.37x = 2,496.21 × 1,216.88
4. Step 4: Simplify right side
   1,807.37x = 3,037,575.54
5. Step 5: Solve for x
   x = 3,037,575.54/1,807.37
6. Step 6: Final answer
   x = 1,680.67