Finding the Fourth Proportional to 1,648.42, 2,472.37 and 608.91

Step by Step Solution

1. Step 1: Write the proportion equation
   1,648.42 : 2,472.37 = 608.91 : x
2. Step 2: Convert to fraction form
   1,648.42/2,472.37 = 608.91/x
3. Step 3: Cross multiply
   1,648.42x = 2,472.37 × 608.91
4. Step 4: Simplify right side
   1,648.42x = 1,505,460.88
5. Step 5: Solve for x
   x = 1,505,460.88/1,648.42
6. Step 6: Final answer
   x = 913.27