Finding the Fourth Proportional to 2,612.00, 3,917.79 and 664.16

Step by Step Solution

1. Step 1: Write the proportion equation
   2,612.00 : 3,917.79 = 664.16 : x
2. Step 2: Convert to fraction form
   2,612.00/3,917.79 = 664.16/x
3. Step 3: Cross multiply
   2,612.00x = 3,917.79 × 664.16
4. Step 4: Simplify right side
   2,612.00x = 2,602,019.82
5. Step 5: Solve for x
   x = 2,602,019.82/2,612.00
6. Step 6: Final answer
   x = 996.18