Finding the Fourth Proportional to 2,934.78, 4,402.08 and 1,085.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,934.78 : 4,402.08 = 1,085.15 : x
2. Step 2: Convert to fraction form
   2,934.78/4,402.08 = 1,085.15/x
3. Step 3: Cross multiply
   2,934.78x = 4,402.08 × 1,085.15
4. Step 4: Simplify right side
   2,934.78x = 4,776,895.10
5. Step 5: Solve for x
   x = 4,776,895.10/2,934.78
6. Step 6: Final answer
   x = 1,627.68