Finding the Fourth Proportional to 3,128.60, 4,693.38 and 1,180.76

Step by Step Solution

1. Step 1: Write the proportion equation
   3,128.60 : 4,693.38 = 1,180.76 : x
2. Step 2: Convert to fraction form
   3,128.60/4,693.38 = 1,180.76/x
3. Step 3: Cross multiply
   3,128.60x = 4,693.38 × 1,180.76
4. Step 4: Simplify right side
   3,128.60x = 5,541,755.37
5. Step 5: Solve for x
   x = 5,541,755.37/3,128.60
6. Step 6: Final answer
   x = 1,771.32