Finding the Fourth Proportional to 2,935.47, 4,402.09 and 854.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,935.47 : 4,402.09 = 854.78 : x
2. Step 2: Convert to fraction form
   2,935.47/4,402.09 = 854.78/x
3. Step 3: Cross multiply
   2,935.47x = 4,402.09 × 854.78
4. Step 4: Simplify right side
   2,935.47x = 3,762,814.22
5. Step 5: Solve for x
   x = 3,762,814.22/2,935.47
6. Step 6: Final answer
   x = 1,281.84