Finding the Fourth Proportional to 3,412.81, 5,118.69 and 947.37

Step by Step Solution

1. Step 1: Write the proportion equation
   3,412.81 : 5,118.69 = 947.37 : x
2. Step 2: Convert to fraction form
   3,412.81/5,118.69 = 947.37/x
3. Step 3: Cross multiply
   3,412.81x = 5,118.69 × 947.37
4. Step 4: Simplify right side
   3,412.81x = 4,849,293.35
5. Step 5: Solve for x
   x = 4,849,293.35/3,412.81
6. Step 6: Final answer
   x = 1,420.91