Finding the Fourth Proportional to 1,379.55, 1,904.20 and 848.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,379.55 : 1,904.20 = 848.59 : x
2. Step 2: Convert to fraction form
   1,379.55/1,904.20 = 848.59/x
3. Step 3: Cross multiply
   1,379.55x = 1,904.20 × 848.59
4. Step 4: Simplify right side
   1,379.55x = 1,615,880.84
5. Step 5: Solve for x
   x = 1,615,880.84/1,379.55
6. Step 6: Final answer
   x = 1,171.31