Finding the Fourth Proportional to 1,607.00, 2,218.15 and 978.09

Step by Step Solution

1. Step 1: Write the proportion equation
   1,607.00 : 2,218.15 = 978.09 : x
2. Step 2: Convert to fraction form
   1,607.00/2,218.15 = 978.09/x
3. Step 3: Cross multiply
   1,607.00x = 2,218.15 × 978.09
4. Step 4: Simplify right side
   1,607.00x = 2,169,550.33
5. Step 5: Solve for x
   x = 2,169,550.33/1,607.00
6. Step 6: Final answer
   x = 1,350.06