Finding the Fourth Proportional to 1,407.94, 1,942.79 and 848.40

Step by Step Solution

1. Step 1: Write the proportion equation
   1,407.94 : 1,942.79 = 848.40 : x
2. Step 2: Convert to fraction form
   1,407.94/1,942.79 = 848.40/x
3. Step 3: Cross multiply
   1,407.94x = 1,942.79 × 848.40
4. Step 4: Simplify right side
   1,407.94x = 1,648,263.04
5. Step 5: Solve for x
   x = 1,648,263.04/1,407.94
6. Step 6: Final answer
   x = 1,170.69