Finding the Fourth Proportional to 3,109.78, 4,665.12 and 1,029.08

Step by Step Solution

1. Step 1: Write the proportion equation
   3,109.78 : 4,665.12 = 1,029.08 : x
2. Step 2: Convert to fraction form
   3,109.78/4,665.12 = 1,029.08/x
3. Step 3: Cross multiply
   3,109.78x = 4,665.12 × 1,029.08
4. Step 4: Simplify right side
   3,109.78x = 4,800,781.69
5. Step 5: Solve for x
   x = 4,800,781.69/3,109.78
6. Step 6: Final answer
   x = 1,543.77