Finding the Fourth Proportional to 2,147.25, 3,221.42 and 608.25

Step by Step Solution

1. Step 1: Write the proportion equation
   2,147.25 : 3,221.42 = 608.25 : x
2. Step 2: Convert to fraction form
   2,147.25/3,221.42 = 608.25/x
3. Step 3: Cross multiply
   2,147.25x = 3,221.42 × 608.25
4. Step 4: Simplify right side
   2,147.25x = 1,959,428.72
5. Step 5: Solve for x
   x = 1,959,428.72/2,147.25
6. Step 6: Final answer
   x = 912.53