Finding the Fourth Proportional to 3,412.75, 5,118.89 and 947.59

Step by Step Solution

1. Step 1: Write the proportion equation
   3,412.75 : 5,118.89 = 947.59 : x
2. Step 2: Convert to fraction form
   3,412.75/5,118.89 = 947.59/x
3. Step 3: Cross multiply
   3,412.75x = 5,118.89 × 947.59
4. Step 4: Simplify right side
   3,412.75x = 4,850,578.64
5. Step 5: Solve for x
   x = 4,850,578.64/3,412.75
6. Step 6: Final answer
   x = 1,421.31