Finding the Fourth Proportional to 2,168.60, 3,253.05 and 608.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,168.60 : 3,253.05 = 608.72 : x
2. Step 2: Convert to fraction form
   2,168.60/3,253.05 = 608.72/x
3. Step 3: Cross multiply
   2,168.60x = 3,253.05 × 608.72
4. Step 4: Simplify right side
   2,168.60x = 1,980,180.33
5. Step 5: Solve for x
   x = 1,980,180.33/2,168.60
6. Step 6: Final answer
   x = 913.12