Finding the Fourth Proportional to 3,412.94, 5,118.89 and 947.49

Step by Step Solution

1. Step 1: Write the proportion equation
   3,412.94 : 5,118.89 = 947.49 : x
2. Step 2: Convert to fraction form
   3,412.94/5,118.89 = 947.49/x
3. Step 3: Cross multiply
   3,412.94x = 5,118.89 × 947.49
4. Step 4: Simplify right side
   3,412.94x = 4,850,092.35
5. Step 5: Solve for x
   x = 4,850,092.35/3,412.94
6. Step 6: Final answer
   x = 1,421.09