Finding the Fourth Proportional to 2,180.76, 3,009.48 and 1,186.05

Step by Step Solution

1. Step 1: Write the proportion equation
   2,180.76 : 3,009.48 = 1,186.05 : x
2. Step 2: Convert to fraction form
   2,180.76/3,009.48 = 1,186.05/x
3. Step 3: Cross multiply
   2,180.76x = 3,009.48 × 1,186.05
4. Step 4: Simplify right side
   2,180.76x = 3,569,393.75
5. Step 5: Solve for x
   x = 3,569,393.75/2,180.76
6. Step 6: Final answer
   x = 1,636.77