Finding the Fourth Proportional to 2,178.72, 3,007.07 and 1,234.51

Step by Step Solution

1. Step 1: Write the proportion equation
   2,178.72 : 3,007.07 = 1,234.51 : x
2. Step 2: Convert to fraction form
   2,178.72/3,007.07 = 1,234.51/x
3. Step 3: Cross multiply
   2,178.72x = 3,007.07 × 1,234.51
4. Step 4: Simplify right side
   2,178.72x = 3,712,260.20
5. Step 5: Solve for x
   x = 3,712,260.20/2,178.72
6. Step 6: Final answer
   x = 1,703.87