Finding the Fourth Proportional to 1,607.58, 2,218.69 and 1,018.17

Step by Step Solution

1. Step 1: Write the proportion equation
   1,607.58 : 2,218.69 = 1,018.17 : x
2. Step 2: Convert to fraction form
   1,607.58/2,218.69 = 1,018.17/x
3. Step 3: Cross multiply
   1,607.58x = 2,218.69 × 1,018.17
4. Step 4: Simplify right side
   1,607.58x = 2,258,992.50
5. Step 5: Solve for x
   x = 2,258,992.50/1,607.58
6. Step 6: Final answer
   x = 1,405.22