Finding the Fourth Proportional to 1,406.70, 1,942.01 and 847.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,406.70 : 1,942.01 = 847.31 : x
2. Step 2: Convert to fraction form
   1,406.70/1,942.01 = 847.31/x
3. Step 3: Cross multiply
   1,406.70x = 1,942.01 × 847.31
4. Step 4: Simplify right side
   1,406.70x = 1,645,470.55
5. Step 5: Solve for x
   x = 1,645,470.55/1,406.70
6. Step 6: Final answer
   x = 1,169.74