Finding the Fourth Proportional to 2,179, 3,007.42 and 1,247.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,179 : 3,007.42 = 1,247.50 : x
2. Step 2: Convert to fraction form
   2,179/3,007.42 = 1,247.50/x
3. Step 3: Cross multiply
   2,179x = 3,007.42 × 1,247.50
4. Step 4: Simplify right side
   2,179x = 3,751,756.45
5. Step 5: Solve for x
   x = 3,751,756.45/2,179
6. Step 6: Final answer
   x = 1,721.78