Finding the Fourth Proportional to 3,085.86, 4,629.12 and 1,005.78

Step by Step Solution

1. Step 1: Write the proportion equation
   3,085.86 : 4,629.12 = 1,005.78 : x
2. Step 2: Convert to fraction form
   3,085.86/4,629.12 = 1,005.78/x
3. Step 3: Cross multiply
   3,085.86x = 4,629.12 × 1,005.78
4. Step 4: Simplify right side
   3,085.86x = 4,655,876.31
5. Step 5: Solve for x
   x = 4,655,876.31/3,085.86
6. Step 6: Final answer
   x = 1,508.78