Finding the Fourth Proportional to 3,113.55, 4,671.72 and 1,165.89

Step by Step Solution

1. Step 1: Write the proportion equation
   3,113.55 : 4,671.72 = 1,165.89 : x
2. Step 2: Convert to fraction form
   3,113.55/4,671.72 = 1,165.89/x
3. Step 3: Cross multiply
   3,113.55x = 4,671.72 × 1,165.89
4. Step 4: Simplify right side
   3,113.55x = 5,446,711.63
5. Step 5: Solve for x
   x = 5,446,711.63/3,113.55
6. Step 6: Final answer
   x = 1,749.36