Finding the Fourth Proportional to 3,105.84, 4,659.20 and 914.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,105.84 : 4,659.20 = 914.72 : x
2. Step 2: Convert to fraction form
   3,105.84/4,659.20 = 914.72/x
3. Step 3: Cross multiply
   3,105.84x = 4,659.20 × 914.72
4. Step 4: Simplify right side
   3,105.84x = 4,261,863.42
5. Step 5: Solve for x
   x = 4,261,863.42/3,105.84
6. Step 6: Final answer
   x = 1,372.21