Finding the Fourth Proportional to 2,122.69, 2,929.31 and 1,178.45

Step by Step Solution

1. Step 1: Write the proportion equation
   2,122.69 : 2,929.31 = 1,178.45 : x
2. Step 2: Convert to fraction form
   2,122.69/2,929.31 = 1,178.45/x
3. Step 3: Cross multiply
   2,122.69x = 2,929.31 × 1,178.45
4. Step 4: Simplify right side
   2,122.69x = 3,452,045.37
5. Step 5: Solve for x
   x = 3,452,045.37/2,122.69
6. Step 6: Final answer
   x = 1,626.26