Finding the Fourth Proportional to 2,179.72, 3,007.96 and 1,185

Step by Step Solution

1. Step 1: Write the proportion equation
   2,179.72 : 3,007.96 = 1,185 : x
2. Step 2: Convert to fraction form
   2,179.72/3,007.96 = 1,185/x
3. Step 3: Cross multiply
   2,179.72x = 3,007.96 × 1,185
4. Step 4: Simplify right side
   2,179.72x = 3,564,432.60
5. Step 5: Solve for x
   x = 3,564,432.60/2,179.72
6. Step 6: Final answer
   x = 1,635.27