Finding the Fourth Proportional to 3,105.42, 4,656.53 and 913.86

Step by Step Solution

1. Step 1: Write the proportion equation
   3,105.42 : 4,656.53 = 913.86 : x
2. Step 2: Convert to fraction form
   3,105.42/4,656.53 = 913.86/x
3. Step 3: Cross multiply
   3,105.42x = 4,656.53 × 913.86
4. Step 4: Simplify right side
   3,105.42x = 4,255,423.58
5. Step 5: Solve for x
   x = 4,255,423.58/3,105.42
6. Step 6: Final answer
   x = 1,370.32